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3. Studio
4. Releases
5. 5.3.0 and earlier

Release Notes for RapidMiner Studio Versions 5.3 and Earlier

Listed below are enhancements and bug fixes for RapidMiner Studio version 5.3, version 5.2, version 5.1, and versions 5.0 and earlier.

What's New in RapidMiner Studio 5.3?

The following improvements are part of RapidMiner Studio 5.3.

Bug fix in RapidMiner Studio 5.3.14

Bug fixes

• BUGFIX: Fixed 'Support Vector Machine' not complaining when input contained missing values

Bug fix in RapidMiner Studio 5.3.13

Bug fixes

• BUGFIX: Fixed a problem with cursors leakage in Oracle databases

Enhancements and bug fixes in RapidMiner Studio 5.3.12

Enhancements

• All operators that write files to disk will create missing directories
• Disabling an operator with a sub-process does not disable its children operators anymore
• Attribute parameters that are marked as mandatory but are not set will now cause an error when executing a process
• RapidMiner creates a log file which logs exceptions
• The operator tree will expand again when searching for operators
• Clustering Algorithms will stop if processes is aborted
• JDBC drivers updated
• Macros in the macro view are by default ordered by macro name
• Adds an API for adding custom functions to the Expression Parser
• Improved performance of the import wizards
• Tabs can now by minimized with Alt+Backspace instead of Ctrl+Backspace
• Removed extensive logging if dockables are missing
• Neural Net: Improved handling of attribute names
• k-Means: Improved Metadata handling
• k-Means: Applying nominal measures to numerical data is not possible anymore
• Linear Regression: Improved missing values handling
• Performance (Costs): Metadata checks for missing attributes
• Map: Reduced the number of warnings shown in the log
• Rename: Renaming attributes to an already existing attribute name is not possible anymore
• Aggregate: Fixed error in median function that occured if ignore_missings was checked
• Read CSV: Renamed 'escape character for quotes' parameter to 'escape character'
• GSP: shows correct renderer in results perspective again
• Loop Parameters: Show correct error if process is run without specifying parameters
• Optimize Parameters: Improved keyboard handling of parameter dialog
• Update Database: Fixed bug in case no columns are SET
• Average: Improved error messages

Bug fixes

• BUGFIX: Fixed problems with uploading binary files to RapidAnalytics
• BUGFIX: Fixed error in CSV import wizard
• BUGFIX: Fixed memory leak in process result perspective
• BUGFIX: Fixed error in Pareto Plotter
• BUGFIX: Fixed error when calculating Cluster Density Performance of kMeans
• BUGFIX: Fixed error in auto-wiring
• BUGFIX: Fixed compatibility issues after copying and pasting operators
• BUGFIX: Fixed bugs in the Regexp dialog
• BUGFIX: Fixed bug in the "cut()" expression* Neural Net: Fixed model which gave different prediction depending whether the example set had a label or not
• BUGFIX: Performance (Costs): Fixed error with missing prediction attribute
• BUGFIX: Read Arff: Fixed handling of missing values in date attributes
• BUGFIX: Expectation Maximum Clustering: Fixed missing values handling
• BUGFIX: GSP: Fixed problems with binominal regualr input attributes
• BUGFIX: Generate Attributes: Fixed removal of attributes if overwriting attributes, keep_all parameter removes all attributes
• BUGFIX: Loop Parameters: Fixed parameter editor dismissing values
• BUGFIX: Send Mail: Fixed bug which caused an error after the password is encrypted
• BUGFIX: Numerical to Date: Fixed error in the attribute selector

Enhancements in RapidMiner Studio 5.3.10

Enhancements

• Plot view now shows preview images of the available standard plotters

Enhancements and bug fixes in RapidMiner Studio 5.3.9

Enhancements

• Added rm.log logfile in .RapidMiner5 folder (found in the user home folder) for easier error diagnosis. The log will be overwritten each time RapidMiner is started.

Bug fixes

• BUGFIX: Fixed some operators only showing the Annotations renderer in the results view, e.g. the Generalized Sequential Patterns operator
• BUGFIX: Fixed 'Update Database' operator to also work when all attributes are set as ID attributes
• BUGFIX: Disabling an operator which contains operators in a subprocess no longer disables its inner operators
• BUGFIX: Pasting process xml into the XML View and clicking "Apply" will now also work when whitespaces have been inserted before the xml
• BUGFIX: Exporting images/pdfs is more robust now
• BUGFIX: Fixed 'Send Mail' operator failing with SMTP passwords set
• BUGFIX: Fixed visual glitch when editing a metadata column header in the Import Wizards and resizing a left-handed column at the same time

Enhancements and bug fixes in RapidMiner Studio 5.3.8

Enhancements

• Plugins can hook into the operator and port context menus to add own entries

Bug fixes

• BUGFIX: Fixed memory leak in the "Fill Data Gaps" operator
• BUGFIX: Fixed error in regular expression dialog
• BUGFIX: Several fixes and improvements for the data import wizard
• BUGFIX: Ignoring missings in the count function will actually ignore the missings in the count and will not display missing for the whole group

Enhancements and bug fixes in RapidMiner Studio 5.3.7

Enhancements

• The current process is auto-saved, and the last edited process can now be restored after RapidMiner has terminated abnormally
• Moved "Close all Results" button in the Results view to the popup menu on result tabs (right-click on a result tab header)
• It is now possible to store different credentials for multiple RapidAnalytics repositories which all point to the same RapidAnalytics
• Support for Vertica database (JDBC driver not shipped with RapidMiner)
• Buttons from the "RapidAnalytics Proceesses" toolbar are moved to the context menu (Stop process, Open result, etc.)
• Newly created repositories must have unique names now

Bug fixes

• BUGFIX: Certain dialogs should be no longer too big when using HD-ready resolution or 1024x768 (e.g. for presentations)
• BUGFIX: Process should no longer be flagged as changed when entering/leaving a subprocess via undo/redo
• BUGFIX: It is no longer possible to create multiple local repositories in the same location
• BUGFIX: Fixed error when trying to import a binary file into a newly created folder
• BUGFIX: Changes to the user credentials in the "Configure Repository" dialog will now take effect without having to restart RapidMiner

Bug fixes in RapidMiner Studio 5.3.6

Bug fixes

• BUGFIX: NPE in CrossDistanceOperator for nominal attributes
• BUGFIX: In the Rename operator the check for existing attribute names will not check the role name

Enhancements and bug fixes in RapidMiner Studio 5.3.5

Enhancements

• Changed drop target highlighting color from light-blue to light-orange
• Process panel will not be highlighted anymore when dragging folders from the Repository View
• Added a GUI preference option for drag target highlighting. Now it is possible to select whether the full target, the target's border or nothing at all should be highlighted.
• In the Repository View it is no longer possible to drag Repositories.
• Process size is now automatically adjusted when entering a subprocess or when loading a process.
• When installing extensions, all licenses can be accepted with one click in a new license dialog.
• Default connection timeout settings changed

Bug fixes

• BUGFIX: Recursive creation of parent directories works properly again in all cases
• BUGFIX: 32-bit Windows version of RapidMiner will now have more than 64 MB memory available when installed on a x64 system
• BUGFIX: Write Database operator table name parameter allows custom names again
• BUGFIX: Fixed disabled operator not always being activated when connected
• BUGFIX: Fixed "Click to branch" popup sometimes appearing at the wrong position
• BUGFIX: Errors during Repository movements should no longer break RapidMiner in headless mode
• BUGFIX: Fixed some error messages and dialogs
• BUGFIX: Process is no longer marked as changed when entering a subprocess
• BUGFIX: Loading documentation from Wiki never blocks UI

Enhancements and bug fixes in RapidMiner Studio 5.3.0

Enhancements

• Development JDK was switched to Java 7 but code still is compatible with Java 6.
• Added new and improved extensive documentation (often including tutorial processes) for almost all operators
• Added improved RapidAnalytics support. New run button: "Run process on RapidAnalytics". Can only be used if the process is stored on a RapidAnalytics repository. Instantly runs the process on the RapidAnalytics server the process is stored on
• Connecting ports in reverse order is possible now (Input port -> output port)
• Run on RapidAnalytics-Dialog can choose execution queue
• New operators: Create Archive File and Add Entry to Archive File allow to create zip files
• New operator: Performance to Data
• New operator: Throw Exception
• New file system operators: Copy File, Move File, Delete File, Rename File, Create Directory
• New operators for handling annotations: Annotate, Annotations to Data, Data to Annotations, Extract Macro from Annotation
• Aggregate: new aggregation functions: sum (fractional), count (fractional), count (percentage) and string concatenation
• Execute Program operator has File Object ports for stdin, stdout, stderr
• Loop Attributes: new output port which collects the data from all iterations
• Macros can be passed through the command line. Example: 'rapidminer //repository/home/test/process -Mkey1=value "-Mkey2=value with spaces"' will provide two macros named key1 and key2
• Result Perspective: Added button in top right corner of a result tab to close all open results at once
• Repositories View: Added button which navigates to the repository location of the currently opened process
• Repositories View: Added popup menu item to open the selected entry in the OS file browser (only for Local Repositories)
• Added new view: 'Macros': This view shows macros and their values in real time during process execution
• More consistent handling of input sinks and output sinks of processes and subprocesses:
  • Sinks can be moved up or down by dragging them with the left mouse key while shift key is pressed
  • Removed double click on process input sink, all actions on process sinks can now be trigged via a popup menu
• Added resize button to text parameter editor dialog
• Added resize button to text parameter editor dialog
• Preferences menu buttons reworked: 'OK' button saves settings permanently and closes the dialog; 'Apply' button saves settings permanently and does not close the dialog
• Generate Data: warn user if the selected number of attributes is not supported by the target function
• The RM window title now shows the complete location of the current process to avoid confusion with multiple processes with the same name
• Trying to create a new process/open another process/exit RM while a process is running now requires user confirmation
• Local repositories which are inaccessible for any reason now have an annotation which shows that they are inaccessible
• 'Remote' repositories are now called 'RapidAnalytics' repositories.
• Plugin loading: when loading manually installed plugins from the webstart or plugins folder with multiple versions, load the one with the highest version number
• Added database metadata caching to improve performance. If you need to clear the cache, use the menu item 'Clear Database Metadata Cache' under the 'Tools' menu.
• Declare Missing Values: allow to declare an empty string as missing, and ignore attributes which are not compatible to the selected mode.
• Extract Macro: added optional list parameter to add unlimited macro name/value pairs when 'macro type' is set to 'data_value'.
• 'Synchronize Meta Data with Real Data' toggle button added in the top right corner of the process view. This will now propagate the real meta data to all reached input ports after process execution. This means that for example the operator after a breakpoint will have its meta data synched with the real data, therefore enabling e.g. attribute selection parameters to show the list of paramters available. Known Issue: Currently this information is lost once the operator updates itself, which happens for example if you deselected/select it again.
• Loop Until: Added 2 checkboxes in order to choose whether you want a condition check depending on the example set or on the performance. 'condition before' is now deselected by default.
• Select Parameters Dialog: Parameters from type ParameterTypeString are now treated like numerical Parameters (the Grid option is enabled now), in case you want to assign a row of numerical values to a String Parameter.
• Select Parameters Dialog: All acceptable parameter types are now shown, even if the continuous/discrete mode is enabled.
• Regular Expression Dialog: Dialog has a new tab: Regex Options. In this tab, the user can define options like multiline mode or case-insensitive matching. These options will be added to the pattern though embedded flag expressions.
• Added new shortcut to toggle the breakpoint before an operator (Shift+F7)
• Improved many error messages
• Update Dialog: Revamped update dialog to show various lists of packages (search, most popular, bookmarks, etc. as well as functionality to log in/out)
• Added a startup check for purchased but not installed extensions and a property to disable the check. Those Extensions can be directly installed from the dialog.
• RapidMiner enters safe mode (not loading plugins) when startup was interrupted
• Added new 'Export as PDF' action to the 'Print results or export' dropdown button
• Deleted tooltips for the operator list of the OptimizeParameters (Grid) operator
• UpdateDialog: Switched the positions of the install button and the link to the extension homepage
• UpdateDialog: Checks if the user purchased the extension when returning to the dialog after hitting the "purchase" button
• Replaced the standard Random function in the ExpressionParser with a custom one in order to involve the random seed/the RandomGenerator for the process
• Updated JTDS driver to version 1.2.5
• Loop Collection Operator has new parameters: 'set iteration macro', 'macro name' and 'macro start value'
• Execute Process Operator: inverted the default values for all boolean parameters
• Repository names now enforce a blacklist of invalid characters
• Operators "Execute Process" and "Retrieve" are now named after the files your drop into the Process window
• Nominal to Numerical: Parameter "default coding" is now set to dummy coding per default
• Changed the help menu entry "Update RapidMiner" to "RapidMiner Marketplace"
• Improved Remote Repository authentication
• Improved data import wizards
• Added default dialog options when running a process
• Added attribute selector for the Extract Performance Operator
• Database access: when several database connections with the same name exist, the once provided by the same server as the process is preferred

Bug fixes

• BUGFIX: Recent files are now updated on process save
• BUGFIX: The condition on performance check at the Loop Until Operator now works properly if the performance decreases
• BUGFIX: Editing context variables now immediately flags the process as changed
• BUGFIX: If set to 'ask', the 'close previous results' dialog will no longer appear when resuming from a breakpoint
• BUGFIX: Breakpoints can no longer be added to the root operator
• BUGFIX: 'Store process here' popup menu action on another process will now correctly flag the process as saved
• BUGFIX: Added error message for 'Find Threshold' operator when an invalid class name is entered as parameter
• BUGFIX: The Pivot operator used on an empty example set no longer creates an example set with one example (filled with missing values)
• BUGFIX: The De-Pivot operator now has much better error handling when trying to setup the index attribute as an already existing attribute
• BUGFIX: Read Excel cannot open the Import Configuration Wizard, if the excel_file parameter is not set
• BUGFIX: Nominal to Binominal can handle border cases with mapping containing less than 2 values
• BUGFIX: Configure Repository dialog now saves user credentials fore remote repositores again
• BUGFIX: Added error shown in Problems view when entering invalid regular expression for 'replace what' parameter of Rename by Replacing operator
• BUGFIX: When moving a repository entry to another location which contains an entry with the same name asks for overwrite instead of showing error
• BUGFIX: Execute Process operator potential error reporting improved
• BUGFIX: Creating folders in repository with the same name but different capitalization (e.g. 'test' and 'Test') is now forbidden
• BUGFIX: filtering numerical and date attributes with Filter Examples is possible again
• BUGFIX: Wrong parameter format in Clone Parameters causes exception
• BUGFIX: Fixed GUI problem when trying to schedule a process on RapidAnalytics without existing RapidAnalytics repositories
• BUGFIX: Fixed possible data loss when trying to store data/processes/etc in the repository using invalid characters for the given filesystem by now showing an error instead of failing silently
• BUGFIX: Fixed possible data loss when trying to move repository entries into their own folder
• BUGFIX: fixed an initialization problem in the Cross Distances operator, which caused wrong calculation of distances in some rare cases
• BUGFIX: Quickfix Dialogs no longer vanish right after showing (RCOMM2012)
• BUGFIX: RapidMiner no longer blocks for a varying amount of time if a connection to an online server fails
• BUGFIX: Focus issue with delete action
• BUGFIX: Import Binary File no longer freezes the GUI
• BUGFIX: New Plotters showed a "This should not happen" message once in a while and where unusable until restart of RapidMiner (Bug #1274)
• BUGFIX: Real to Integer operator: don't convert missings to 0, but keep them as missing
• BUGFIX: Fixed wrong cell selection on rightclick for some tables after reordering columns
• BUGFIX: Fixed startup failure when trying to start RapidMiner with broken Plugins
• BUGFIX: Optimized update routine. Instead of failing with an cryptic error if no admin rights available, RapidMiner no shows an dialog that asks for admin rights
• BUGFIX: Fixed the "Select for installation" button: Error when content/behaviour changed according to factors like if the extension was purchased. Now leads to the extension website when purchased but not installed. Now reacts properly to double-clicks in the extension list The "Install" button turns to a disabled state when no extensions are marked for installation
• BUGFIX: AccountService is only queried when we are logged in. The login state is saved internally
• BUGFIX: Process undo steps are now reset when a new process is opened
• BUGFIX: Using undo in a subprocess will no longer reset the view to the top-level of the process
• BUGFIX: The welcome perspective now updates the recent files list, so opening a process via it now opens the correct selected process
• BUGFIX: Drag&Drop from the OS to the RapidMiner Process design canvas now also works for .xlsx files
• BUGFIX: Fixed several repository problems when trying to overwrite entries with themselves
• BUGFIX: UpdateDialog: Purchase link now changes to "install" after logging in and the purchase button now redirects to the extension website
• BUGFIX: Generate Aggregation operator can now handle the case of zero matching attributes
• BUGFIX: Fixed several key shortcuts that worked in the wrong perspective. For example, it is no longer possible to delete operators while in the result perspective
• BUGFIX: Drag&Drop of files (e.g. .csv/.xls) creates the corresponding read operator with the now correct filename parameter
• BUGFIX: Drag&Drop of operators should no longer create operators halfway outside the process canvas
• BUGFIX: Import wizards will no longer overwrite existing data without asking for permission first
• BUGFIX: Import wizards will no longer accept wrong file types/invalid filenames in the first step
• BUGFIX: Read SAS operator no longer causes an internal error when the data file could not be read
• BUGFIX: "Wiki" links in the documentation tried to open a tutorial process, now open the corresponding wiki page
• BUGFIX: Macro Editor will now remember entered values without having to press enter
• BUGFIX: Opening the context menu on result tables will no longer deselect the currently selected cells
• BUGFIX: Pressing "Delete" in a subprocess with the surrounding operator selected will no longer result in deletion of the whole subprocess

What's New in RapidMiner Studio 5.2?

The following improvements are part of RapidMiner Studio 5.2.

Enhancements and bug fixes in RapidMiner Studio 5.2.8

Enhancements

• Send Mail operator has a new behavior: Stop process and show error if mail cannot be send
• Send Mail operator has a new parameter: 'Ignore errors'
• Write CSV operator has a new parameter: 'Append to file'
• Write Excel operator has a new parameter: File Format (xls, xlsx)
• New Operator: Reorder Attributes
• Set Macro: now can define empty macros

Bug fixes

• BUGFIX: Fix a "This should not happen" message in the Advanced Charts.
• BUGFIX: Keep old settings after updating RapidMiner
• BUGFIX: 'Cancel' ParameterTypeList Dialog works correctly now
• BUGFIX: FP-Growth correctly handles parameter 'must contain'
• BUGFIX: Join Operator displays MetaData correctly

Enhancements in RapidMiner Studio 5.2.6

Enhancements

• Read SAS operator
• Added timezone parameter to Date to Nominal operator
• Excel 2007 support
• Dialog for editing cron expressions
• Dialog to see preview for regular expressions
• Update Database operator
• Easier mechanism for Extensions to create configurable items
• Japanese and German translation

Enhancements in RapidMiner Studio 5.2.2

Enhancements

• Remove Correlated Attributes uses deterministic random numbers
• Improved Repository Tree handling (save expansion state on refresh and improved tree selection on entry removal)
• Improved exporting of Advanced Charts View

Enhancements in RapidMiner Studio 5.2.1

Enhancements

• Added operators to manage repository entries: Copy, Move, Delete, Rename

Enhancements in RapidMiner Studio 5.2.0

Enhancements

• Added "Advanced Charts" view
• Added "File" objects to pass to reader operators.
  • Added operators to open files and URL connections
  • Added operators to iterate ZIP files
• Superset and Union operator can handle special attributes
• Catch block subprocess for Handle Exception operator
• Database connections can define driver properties
• XML import
• Join operator can operate on multiple columns
• Easier bug reporting: Direct connection to Bugzilla
• Added new Operators:
  • Denormalization Operator
  • Remove Unused Values Operator
  • Loop Repository
  • Open File, Write File, Loop Zip-File Entries
  • Read Excel with Format
• Aggregation Operator now supports default Aggregation for a set of attributes and is implemented more efficiently
• The last edited process can now be restored after RapidMiner has terminated abnormally

What's New in RapidMiner Studio 5.1?

The following improvements are part of RapidMiner Studio 5.1.

Enhancements

• Added RapidAnalytics connectivity
• Added new repository type that reflects database connections
• Added type-specific icons to repository tree
• Added annotations to IOObjects
• Import operators and wizards remake
• Most wanted feature: "Rename" and "Set Role" can handle multiple attributes at a time
• Versioned operators allow easier updates
• "Generate Attributes" has new UI and supports more text and date functions
• Operator documentation uses Wiki (http://rapid-i.com/wiki/).
• IOObjects can be annotated, e.g. with file source or SQL statement
• Added new Operators:
  • Print to Console
  • Unset Macro
  • "Auto MLP" and "k-Means (fast)" contributed by DFKI
  • Hierarchical Classification
  • Numerical to Date
  • Delay
• Database operators can prepare statements
• Revised import wizards
• Background tasks stoppable
• Added process profiling and resource consumption annotations
• Added Support for R Extension
• Added new boolean GUI property rapidminer.gui.fetch_data_base_table_names which suppresses to fetch data base table names in the SQLQueryBuilder
• More efficient meta data handling for Excel, CSV, and database readers

• Meta data propagation uses context macros throw new UserError (this, "move_file.exists", destinationFile);

• Splash screen shows plugins

• Aggregate operator can compute product
• Various smaller fixes
• Various UI improvements

Bug fixes:

• Fixed memory leak causing RapidMiner to run out of memory if processed many and large example sets
• Re-added descriptive error messages

What's New in RapidMiner Studio 5.0 and earlier?

The following improvements are part of RapidMiner Studio 5.0 and earlier.

What’s New in RapidMiner Studio 5.0 [2009/12/8]?

Enhancements

• Added an operator for performing a local polynomial regression
• Added an operator for calculating weights using a local polynomial regression.
• Added an operator for extracting the cluster centroids or prototypes from a flat cluster model.
• Added an operator for calculating the cross distances between example sets.

What's New in RapidMiner Studio 5.0beta [2009/09/30]?

Enhancements

• Redesigned graphical user interface comprising a docking framework to freely layout GUI components and save different layouts in multiple perspectives.
• New visual representation of processes, i.e. a graph-based flow layout which allows to define and observe the actual data flows in processes in a very intuitive way.
• Added automatic generation, propagation and transformation of meta data simulating the actual data handling in RapidMiner at design time allows for much less error-prone process design. Quickfixes provide hints and solutions in case of inaccurate parameter settings, erroneous operator usage, etc.
• Added repository module allowing to conveniently store, manage and archive processes, data, models and any other arbitrary data object in RM.
• New process context provides a new way to define the inputs and outputs of processes and allows a better integration and sharing of processes in distributed settings.
• New result history view provides an overview of recent process results.
• Consolidated operator names and implemented a reasoned operator naming scheme which provides easier access for beginners as well as experienced RapidMiner users.

What's New in RapidMiner Studio 4.5 [2009/07/20]?

Enhancements

• New Weka version (as of September 21st, 2009)
• Implementation Details:
  • New properties for additional ioobjects.xml

Bug fixes

• Fixed bug for reporting images smaller than 800 x 600
• Fixed class loader problem occurring when more than one plugin was used
• Fixed bug for iterative operator chain
• Fixed XML export bug where XML in parameters was not properly escaped
• Fixed bug in parallel cross validation

What's New in RapidMiner Studio 4.4.2 [2009/07/11]?

Enhancements

• New operators:
  • FormulaExtractor
  • Trend
  • LagSeries
  • VectorLinearRegression
  • ExampleSetMinus
  • ExampleSetIntersect
  • Partition
  • Script
• Drastically reduced access times for attribute retrieval by name
• Improved the operator Aggregation in terms of speed and memory consumption
• Improved the operator ExampleSetJoin, correct inner join for example sets with non-equal numbers of ids, added left and right outer joins
• Latest version of Weka (as of 2009/07/11)
• Latest version of MySQL JDBC driver (5.1.17)
• Implementation Details:
  • Updated to new versions of Jung and JFreeChart

Bug fixes

• Fixed bug in Split operator for ordered splits where shorter sequences did not get filled with ?
• Fixed bug in FeatureSubsetIteration where not all subsets where used during the iteration

What's New in RapidMiner Studio 4.4.1 [2009/04/30]?

Enhancements

• New operators:
  • ForwardSelection
  • NeuralNetImproved
  • KernelNaiveBayes
  • ExhaustiveSubgroupDiscovery
  • URLExampleSource
  • NonDominatedSorting
• Deprecated operators:
  • NeuralNet (use NeuralNetImproved instead)
  • NeuralNetSimple (use NeuralNetImproved instead)
• Deprecated operators are also shown in context menu with a light gray color now
• The notification mail at the end of a process can now also be sent by SMTP instead of sendmail
• Most file based data input operators now provide an option to skip error lines
• Most file based example source operators (Arff, Excel, DasyLab, Stata, SPSS, XRFF) as well as the IOObjectReader and the new URLExampleSource now accept URLs instead of a filename for the input source location
• All discretization models now support the definition of the desired number of digits for automatic interval name determination
• The LiftParetoChart now supports the definition of the number of digits for the confidence intervals
• Improved time display in status bar
• Enabling / Disabling operator now works with CTRL-E
• Fixed several issues in GUI thread handling which might have lead to deadlocks and long GUI updates on certain systems
• Clean-up of nominal value mappings in process log table in case of sorted top-k for reduced memory footprint
• Implementation Details:
  • DistanceMeasure creation now is based on the operator and gets the input container as well

Bug fixes:

• NeuralNet and NeuralNetSimple did not properly work on regression problems. While NeuralNetSimple could be fixed, a new operator NeuralNetImproved is now provided which should be used instead of NeuralNet and NeuralNetSimple. Since this operator is also faster and more scalable, it should be used instead of the both old (and now deprecated) neural net implementations
• Fixed bug in renaming where decimal point characters got lost
• Fixed issue in model applying leading to a wrong remapping of the label values afterwards if an independent test set was used. Important: this bug did not deliver wrong predictions but simply changed the label values displaying.
• Fixed several issues in GUI thread handling which might have lead to deadlocks and long GUI updates on certain systems
• Fixed bug in bar chart for numerical group by columns
• Fixed bug in DasyLab example source which sometimes led to doubled characters at the end of feature names
• Fixed bug in OperatorSelector for macro usage

What's New in RapidMiner Studio 4.4 [2009/03/14]?

Enhancements

• New operators:
  • ExampleSetSuperset
  • ExampleSetUnion
  • MacroConstruction
  • CumulateSeries
  • FastLargeMargin
  • Split
  • Construction2Names
  • NeuralNetSimple
• Parameters will now be adapted according to an operator rename, for example the settings of operators like the ProcessLog or the parameter optimization operators are automatically corrected to the new operator names
• Graphs like the similarity graph display the strengths of the edges now by their color
• Added new tree layout algorithm for the decision trees preventing most overlapping, the old tighter version is available as layout type "Tree (Tight)"
• Decision trees now show the subtree size as tool tip for the inner nodes, the edges are now darker for larger subtrees and brighter for smaller ones
• Decision trees are learned faster now due to internal optimizations in the splitted example set handling
• Tables like the (meta) data view now supports a new context menu for common table operations like column sorting or row / column selection
• The "New Operator" dialog now also supports full text search in the description texts of the operators
• RapidMiner now stores all parameter values in the process files including the default values which ensures a better compatibility with future versions. The XML tab, however, only shows the values differing from the default
• Plugins can now define a class com.rapidminer.PluginInit providing a method "initPlugin()" which will be invoked during plugin initialization
• Univariate and multivariate series windowing operators now also support nominal attributes and even mixed types in cases where the series is represented by the examples (rows) of the data set
• The range statistics of nominal attributes in the meta data view now shows the values with highest and lowest occurrency counts, sorts the values according to the counts, and displays only an excerpt of the occurring values if large amounts of different values exist
• List of recent files is now directly saved after opening a new process and not only during shutdown
• Changes in the process setup are now allowed even during process runtime, e.g. when waiting at a breakpoint
• NaiveBayes can now handle new nominal values during the model application phase
• Deprecated operators are now rendered with a gray color in the new operator tab and dialog
• Updated to the latest version of Weka (as of February 26th, 2009)
• Updated to the latest version of Joone, optimized some of the neural network default parameters
• Added some new sample processes to the sample directory as well as to the tutorial
• ExampleFilter and most important discretization parameters are no longer expert parameters
• ArffExampleSource now states an error message in cases where attributes containing a space which is not quoted
• New binominal classification performance measures:
  • positive predictive value
  • negative predictive value
  • psep
• Implementation details:
  • SplittedExampleSet has been improved leading to faster data access times for operators like cross validation or decision tree learning
  • Plugins can now define a class com.rapidminer.PluginInit providing a method "initPlugin()" which will be invoked during plugin initialization

Bug fixes

• Fixed bug accuracy criterion for the revised decision tree learner
• Fixed bug in parameter list of ValueSubgroupIterator
• Fixed bug in ExceptionHandling which sometimes led to doubled outputs
• Fixed bug in ProcessBranch which sometimes led to doubled outputs
• ViewAttributes did not add min and max statistics so that those statistics where not calculated on data table views
• Fixed bug in Windows GUI start script (linebreak)
• Fixed bug for surface 3D plot where x and y were replaced by each other
• Fixed paths to icons for building blocks
• Fixed issue with ROC plots in cases where several points with same confidence occurred
• Fixed potential thread deadlock during the filling of the plotter list
• Fixed bug for distance weighted vote and k = 1 in NearestNeighbors
• Fixed a bug in ChiSquaredWeighting for mixed-type data sets where the number of bins was smaller than the maximum number of nominal values

• The default global random seed in the preferences dialog was not allowed to be set to -1 throw new UserError (this, "move_file.exists", destinationFile);

• The property keys of the preferences dialog were editable

• Fixed bug in PolynomialRegression
• Range normalization now delivers maximum value for constant attributes
• Weighted precision and recall do now no longer deliver NaN if a class did not occur

What's New in RapidMiner Studio 4.3.2 [2009/02/17]

Enhancements

• New operators:
  • LinearDiscriminantAnalysis
  • QuadraticDiscriminantAnalysis
  • RegularizedDiscriminantAnalysis
  • DasyLabExampleSource
  • FileIterator
  • ExceptionHandling
  • ChangeAttributeNamesReplace
  • ChangeAttributeNames2Generic
  • DateAdjust
  • MinMaxBinDiscretization
  • RainflowMatrix
• Deprecated operators:
  • DirectoryIterator (use FileIterator instead)
• Renamed parameters:
  • ExampleSetWriter: quote_whitespace is now named quote_nominal_values
• ExampleSetMerge can now handle missing values
• RapidMiner does now better support counts for the in- and output types which should considerably reduce the amount of warnings if operators like IOConsumer, IOMultiplier or ExampleSetMerge (reducing several objects of the same type to one of the same) are used
• FileIterator replaces DirectoryIterator and adds many new features like recursive iteration, file name based filtering, and a new macro for the parent path
• Centroid based clusterings now support assigning unseen examples to the nearest cluster on apply time
• ProcessBranch now supports a branching with respect to the existance of an input object
• ClearProcessLog now also allows to remove the complete logging table
• The logging tables of the ProcessLog operator will now not be generated during start up but during the first operator usage (and also during the following if the table was deleted in the meantime, e.g. in a loop)
• Added support for different time zones, users can now define the preferred time zone in the settings dialog and time conversion operators are not able to respect this setting
• Date and times are now displayed in the system's local settings
• New plotter: Block
• Added support for applying a log scale for the color column for the Scatter plot and the new Block plotter
• Data tables like those generated by the process log are now de-coupled from the table used for plotting preventing that the rows will be sampled and rows would be removed from the data table
• A double click on the region between two columns in the table header now automatically resizes the left column to a fitting size (known from Windows programs)
• A double click on the same region while pressing CTRL will resize all table columns according to the contents
• GuessValueTypes now only works on regular attributes and provides a parameter for extending it on the special attributes (work_on_special)
• AttributeFilter now also provides a new parameter work_on_special
• The operator Replace now also allows empty replace_by values
• The ExampleSetJoin operator now also works if the id of the first example set is not part of the second
• Guess value types can now handle missing values
• CSVExampleSetWriter now supports the parameter quote_nominal
• All feature selection and weighting operators now also provide the possibility to log the names of the features of the current generation's best individual
• The Replace operator now supports capturing groups
• The file based example source operators (ExampleSource, SimpleExampleSource, CSVExampleSource...) now better supports quoted strings and also escaped quotes (escaping with \")
• Implementation details:
  • The method Tools.quotedSplit(...) should now be used instead of a regular split followed by the method Tools.mergeQuotedSplits(...)

Bug fixes

• Fixed bug in DBScan for empty cluster models
• Fixed bug for simple sampling in cases where a local
• Fixed bug in process logging to files which prevented the writing of the first logged result
• Fixed bug in PSO optimization for cases where the fitness should be minimized instead of maximized
• Fixed bug in binary performance measure which was not delivering the fitness for specificity, sensitivity, and youden index
• Fixed bug in meta data table viewer in cases where huge numbers of long nominal values existed which caused a crash of the Java Virtual Machine in some cases

What's New in RapidMiner Studio 4.3.1 [2009/01/12]?

Enhancements

• New operators:

  • RemoveDuplicates
  • Cluster2Prediction
  • DirectoryIterator
  • TextObjectWriter
  • TextObjectLoader
  • TextExtractor
  • SingleTextObjectInput
  • TextCleaner
  • TextObject2ExampleSet
  • TextSegmenter
  • AddAttribute
  • SetData
  • EMClustering
  • AttributeWeights2ExampleSet
  • TransitionGraph
  • DatabaseExampleVisualizationOperator

• Revised decision tree learning which lead to drastically reduced runtimes and better tree models in terms of generalization capabilities

• The bar chart now displays the category as label in the domain axis
• Removed plotter: Bars 3D
• The IOObjectReader now allows the definition of the expected output type
• The LiftParetoChart does no longer re-apply the input model if a predicted label does already exist
• Added the ability to "explode" tiles of pie and ring charts
• Added several new options for the reporting operators of the RapidMiner Enterprise Edition as well as true parameter handling including type checks
• Updated to latest release of Jung
• Fixed GUI related memory leaks
• Implementation details:
  • The class AttributeWeightsCreator was renamed to ExampleSet2AttributeWeights

Bug fixes:

• Fixed a combination of GUI and process thread related memory leaks
• Fixed bug in Series Multiple Plotter which prevented rescaling
• Pie and Bar charts used class limit instead of legend limit in order to decide if the legend should be shown
• special format in ExampleSetWriter ignored quote whitespace setting
• Fixed bug in XVPrediction

What's New in RapidMiner Studio 4.3 [2008/11/22]?

• New operators:

  • AccessExampleSource
  • Example2AttributePivoting
  • Attribute2ExamplePivoting
  • PolynomialRegression
  • Similarity2ExampleSet
  • ExampleSet2SimilarityExampleSet
  • Nominal2String
  • String2Nominal
  • Date2Numerical
  • Real2Integer
  • Numerical2Real
  • Nominal2Numerical
  • Numerical2Binominal
  • Numerical2Polynominal
  • AbsoluteDiscretization
  • ConditionedFeatureGeneration
  • AttributeAggregation
  • SupportVectorCounter
  • MutualInformationMatrix
  • GaussFeatureConstructionOperator
  • ProductGenerationOperator
  • AbsoluteValues
  • MovingAverage
  • ExponentialSmoothing
  • SeriesMissingValueReplenishment
  • DifferentiateSeries
  • IndexSeries
  • Numerical2Real
  • Real2Integer
  • FillDataGaps
  • EnsureMonotonicity
  • WindowExamples2ModelingData
  • WindowExamples2OriginalData
  • ProcessLog2AttributeWeights
  • Mapping
  • Substring
  • Trim
  • Replace
  • AddValue
  • MergeValues
  • AttributeConstruction
  • ValueIterator
  • IOStorer
  • IORetriever
  • SQLExecution
  • ClearProcessLog
  • ProcessLog2ExampleSet
  • Data2Performance
  • Data2Log
  • Macro2Log
  • DataMacroDefinition
  • LiftParetoChart

• Deprecated Operators:

  • Nominal2Numeric (please use Nominal2Numerical instead)
  • Numeric2Binominal (please use Numerical2Binominal instead)
  • Numeric2Polynominal (please use Numerical2Polynominal instead)
  • LinearCombination (please use AttributeAggregation instead)
  • AttributeValueMapper (please use Mapping instead)
  • AttributeValueSubstring (please use Substring instead)
  • AddNominalValue (please use AddValue instead)
  • MergeNominalValues (please use MergeValues instead)

• New implementation of clusterings for more efficient computing and memory usage:

• Reimplemented or adapted operators:

  • AgglomerativeClustering
  • ClusterModel2ExampleSet
  • DBScanClustering
  • ExampleSet2ClusterModel
  • FlattenClusterModel
  • KMeans
  • KMedoids
  • KernelKMeans
  • RandomFlatClustering
  • SupportVectorClustering
  • TopDownClustering
  • ClusterModelWriter
  • ClusterModelReader
  • TransitionMatrix

• Removed operators:

  • AgglomerativeFlatClustering, use AgglomerativeClustering and FlattenClusterModel instead
  • BregmanHardClustering, use KMeans with BregmanDivergences instead
  • ExampleSet2ClusterConstraintList
  • MPCKMeans
  • TopDownRandomClustering, use TopDownClustering with RandomFlatClustering as inner learner
  • UPGMAClustering, use AgglomerativeClustering with average link instead
  • SimilarityComparator

• The new AttributeConstruction operator supports infix written formulas, a simple format for constants and new calculation methods

• Better support for special characters in process XML
• Macros are now also supported in parameter lists and for numerical parameters
• Added new overwriting mode to the DatabaseExampleSetWriter named "first overwrite, then append"
• Replaced "append" parameter in ExampleSetWriter by the new overwriting modes "none", "overwrite", "append", and "first overwrite, then append"
• ExampleFilter can now use regular expressions for the values of the nominal attribute value filtering
• New Plotter: Pareto Chart
• New Plotter: Series Multiple
• New Plotter: Scatter Multiple
• The old scatter plotter has been divided into a new Scatter plot and the new Scatter Multiple plot
• Most plotters now support panning during zooming by pressing the Ctrl Key while dragging the mouse
• The file chooser in the modern look and feel now always remembers the last directory from which a file was chosen as an additional default bookmark (on the left)
• Changed the order the in which models are added to the grouped model (ModelGrouper), i.e. the last created model will now be added as last one
• The wizards of the database reading and writing operators are now initialized with the last settings
• The feature selection and feature weighting operators are now based on double arrays which should lead to smaller memory footprints
• Added new performance measures:
  • sensitivity
  • specificity
  • Youden index
  • relative error lenient
  • relative error strict
• The CachedDatabaseExampleSource operator has now a more appropriate wizard
• The plotters now provide consistent colors for classes
• Improved the names of the features of the (multi-)variate windowing operators
• Multivariate windowing now also supports a name for the label column in addition to the index
• Multivariate windowing can now also applied without the creation of a label and even with horizon 0
• Improved the graph and plotter panel for long column / item names, long names are now displayed in a short fashion and the full name is shown as tool tip
• DecisionTree now supports a new parameter min_size_for_split
• Added new process branch conditions:
  • attribute_available
  • min_examples
  • max_examples
  • min_attributes
  • max_attributes
• The viewers for symmetrical matrices like correlations etc. now always shows the values of the first column
• Improved the range names of discretized data
• Added selection of criterion to AssociationRulesGenerator, also improved the visualization of association rules by adding a selector for the criterion used for the minimum value slider
• Added new option for Normalization. Now might chose from z-transformation, range-transformation or the new proportional transformation via category selection.
• LinearRegression is now also applicable on binominal classification tasks
• Added support for logging only the top-k or bottom-k objects with the ProcessLog operator
• Improved the parameter optimization / iteration dialog: small numbers are no longer cut off, GUI is more consistent, dialog now used icons
• Improved the CachedDatabaseExampleSource operator and database handling: now arbitrary tables are accepted and primary keys (index) and / or mapping tables are automatically handled
• Integrated the latest version of the JFreeChart library
• A dialog informs the users now if any unknown parameters were part of the process during loading
• A SimpleVoteModel now supports the output of textual results
• (Multivariate) Windowing on example based input representations now keep the input id attribute
• Added writing of intermediate weights for GeneticAlgorithm (feature selection) and EvolutionaryWeighting (feature weighting), both operators now also support the initialization with attribute weights (e.g. from the last run)
• Implementation Details:
  • Moved AnovaMatrix(Operator) into the package com.rapidminer.operatir.visualization.dependencies
  • Moved all attributes based matrix operators (correlation, covariance etc.) into the new package com.rapidminer.operatir.visualization.dependencies
  • Moved aggregation functions into package com.rapidminer.tools.math.function.aggregation

Bug fixes

• processes now only write the logged information from the run, not the global information for example collected from the GUI. Hence, the logging will also no longer directly overwrite old log files right after loading
• switch workspace and initial workspace selection now prevent the selection of the RapidMiner main directory and all subdirectories in order to prevent a recursive copy
• switched weight "direction" for corpus based weighting
• fixed bug in evolutionary parameter optimization in combination with logging
• fixed bug in Wizard for ExampleSource preventing the correct guess of value types (were always nominal)
• fixed error in nominal re-mapping for cases where the nominal values of training and test set did not match
• fixed jittering bug in Histogram plots causing the bins to drop out of the plotter
• fixed minor bug in ExampleSetWriter which caused the ExampleSource operator to state a warning
• fixed bug if special characters were part of the process XML
• DistributionModel is updatable now
• AttributeValueSubstring ignores missing values and is able to extract single characters now
• Fixed a GUI error only occurring in Java 6 Update 10
• Fixed bug in FeatureSubsetIteration where the specified maximum number of features was not used
• Fixed bug in PerformanceVector writing from the result dialog (Save button) which led to large data files and long runtimes until the data was actually saved
• Fixed bug in uninstaller which under certain circumstances also removed non-RapidMiner files in the installation directory

What's New in RapidMiner Studio 4.2 [2008/07/14]?

Enhancements

• New operators:

  • Nominal2Date
  • Date2Nominal
  • KernelPCA
  • EqualLabelWeighting
  • StataExampleSource
  • FeatureSubsetIteration
  • RelativeRegression
  • AttributeValueSubstring
  • CachedDatabaseExampleSource
  • NameBasedWeighting
  • BatchProcessing
  • GroupModel
  • UngroupModel

• Aggregation now supports multiple aggregations (also of different attributes) as well as grouping by values of multiple attributes. Aggregation attributes and functions are now specified by a parameter list.

• Added support for attributes with value types date, time, and data_time: these can be created from nominal attributes with the operator Nominal2Date for arbitrary date formats
• Histogram plotters now support jittering and log scales
• The database wizard is improved and now supports large data sets which caused memory problems in the older versions during table and attribute name retrieval
• The statistics in the meta data view of data sets are no longer calculated per default for data sets larger then 100000 rows - the calculation is available from the menu in the upper right corner
• "ExampleSet" was renamed to "Data Table", the rows are still called "Example" and the columns are still called "Attribute"
• The iteration through partitioned / splitted data sets is now more efficient (especially for linearly splitted sets)
• All plotters can now handle missing values
• Many plotters now support the plotting of absolute values and / or sorting according to the plotted column
• Removed time-consuming checks (including a full data scan before plotting)
• One-Class SVM for LibSVMLearner now properly supported
• The new operators GroupModel and UngroupModel now replace the automatic building of ContainerModels (merging preprocessing with prediction models) and hence give the user more control over the model building / grouping process
• AttributeSubsetPreprocessing now supports the inversion of the specified regular expression
• The operator AttributeSubsetPreprocessing was enhanced so that it can now be applied on subsets defined similarly to the new AttributeFilter operator. Hence, the subset preprocessing can for example only be performed on nominal or numerical attributes
• The database example set writer now supports new overwriting / appending modes
• Instead of the "work_on_database" mode of the usual DatabaseExampleSource operator we now recommend the new operator CachedDatabaseExampleSource which will keep the data in the database in a more efficient way. However, please note that writing in such a table is not directly possible and must be performed with a DatabaseExampleSetWriter
• Implementation Details:
  • optimized KNN for speed issues, gaining boost up to 13x
  • replaced NaiveBayes with highly efficient version (changes: distribution plots now show conditional probabilities without consideration of a priori probabilities, heuristic use of kernels has been removed)
  • integration of RapidMiner is now easier since the location of plugins and Weka can be properly defined with settings and the definition of "rapidminer.home" is no longer necessary
  • clean-up for value types (Ontology)
  • The ValueInterface now delivers Object instead of double, i.e. the logging of nominal values is now also supported
  • New renderer service for providing the visualizations of the results. This will replace the method getVisualizationComponent() in the long run
  • added latest version of the chart library (as of July 13th 2008)
  • added latest version of Weka (as of July 13th 2008)

Bug fixes

• Fixed two bugs in new parameter wizard gui for string and integer parameters
• CSV- and SimpleExampleSource now accept lines which correctly divided empty strings (i.e. missing values) at the end of the lines
• Fixed wrong number of bins for the square root number of bins in the frequency discretization operator
• Fixed closing behaviour of the switch workspace dialog
• Changes in XML tab were not used if the tab was left in other ways than by changing the tab to another one

What's New in RapidMiner Studio 4.1 [2008/05/09]?

Enhancements

• New operators:

  • StratifiedSampling
  • AbsoluteStratifiedSampling
  • GuessValueTypes
  • UseRowAsAttributeNames
  • MemoryCleanUp
  • MaterializeDataInMemory
  • UncertainPredictionsTransformation
  • CovarianceMatrix
  • AttributeFilter
  • RandomSelection
  • FrequentItemSetUnificator
  • FrequentItemSetAttributeCreator
  • OperatorSelector
  • CostEvaluator
  • AttributeMerge
  • KennardStoneSampling

• New 64 bit version for Windows x64 OS now provided; other 64 bit systems are supported by using a 64 bit Java version

• Parameter optimization operators now provide a nicer wizard dialog for setting the parameters
• All GUI elements provide now longer descriptions for operators
• SplitChain and AbsoluteSplitChain were moved from the postprocessing into the meta group
• Meta group was restructured and two subgroups (control and other) were added
• Fixed a memory leak in the result history which was affecting the GUI for multiple processes if they were performed in a single sequence
• SOMDimensionalityReduction and SVDReduction are now able to create a preprocessing model
• BruteForce and GeneticAlgorithm feature selection now support a minimum and maximum number of features and also the selection of a exact number of features
• RapidMiner now offers two different look and feels: modern (recommended) and classic
• Improved comment tab so that it already registers and saves new text directly after it was typed (instead of changing the tab)
• DataStatistics (IOObject) now shows the standard deviation like in the GUI instead of the variance
• Robustified ExampleSource wizard: the same output files as the input file are no longer allowed
• Series Plotter does now no longer scale the axis ranges in a way that zero must be contained
• All SVM and other hyperplane models now supports the visualization of a sortable data table for the coefficients (weights)
• An error message now indicates if XML entities are used for operator names which is not allowed
• Anova calculator now allows value editing in table and the specification of the significance level
• Meta data views can now be correctly sorted according to sum or unknown value columns
• MissingValueImputation: added warnings in the case that not all values could be imputed, improved attribute ordering (ascending and descending sorting, sort by number of missing values), added log messages
• Naive Bayes distribution model now uses the same class coloring for both numerical and nominal distributions
• Latest available Weka version integrated (as of 2008/05/09)
• Implementation Details:
  • The AttributeParser no longer supports batch generations
  • The ClusterModel reader is now able to read both compressed and uncompressed files
  • PCA and GHA now use global covariance matrix calculation

Bug fixes

• LibSVMLearner now provides the correct range for the nu parameter
• Fixed bug in AttributeParser which prevents the correct calculation for nested generations or cases where the generation is divided into several operators
• Fixed bug in value type guessing for numerical columns with missing values
• Fixed bug in ExampleSetTranspose for missing values in nominal attributes
• Fixed bug in DatabaseExampleSource Wizards for user defined URLs
• Parameter lists are now cloned correctly
• Fixed bug for quoted input files occuring in some cases where the quoted string was part of the line before
• Fixed a bug for learning with example weights with the JMySVM learner
• Fixed a NPE if empty example sets were used as input for feature selection operators
• Fixed wrong normalization for confidences predicted by distribution models (e.g. NaiveBayes)
• AttributeEditor and ExampleSource wizard did not regard the decimal point character (and quotes)
• The value type guessing operators did not take a possible decimal point character different from '.' into account
• Fixed tool tip for z-transform in Normalization operator: changed "variance" to "standard deviation"
• Fixed locale for Ok - Cancel dialogs to US locale like the rest of RapidMiner
• Fixed bug in operator tree which caused the reconstruction of the expansion state to be faulty in some cases
• Fixed statistics copy bug introduced in 4.1beta2 for predicted label statistics

What's New in RapidMiner Studio 4.1beta2 [2008/02/15]?

Enhancements

• New operators:
  • ProcessBranch
  • FileEcho
  • ExchangeAttributeRoles
  • ChangeAttributeRole
  • SeriesPrediction
• Deprecated operators:
  • ChangeAttributeType (use ChangeAttributeRole instead)
• New version of chart plotting library
• New plotter: Series
• Removed the numerical sample sizes for the tree and rule learners
• Introduced different shapes for plotter points
• Use bigger strokes for plotter lines
• Added max_items parameter for FPGrowth
• Changed default mode for view creation of preprocessing models
• Added signum generator for manual feature generation and for generation with YAGGA2
• Relief can now handle missing values
• Changed default data representation back to double because too high number of rounding errors otherwise for larger data ranges
• Implementation Details:
  • Introduced AttributeDescriptions and AttributeTransformations in order to lower large memory consumptions due to clones and to avoid re-wrappings for new views on the example set view stack
  • removed clone of mappings for clones of nominal attributes
  • Changed DataRow methods from package private to protected
  • ConditionedExampleSets no longer support dynamical conditions
  • Changed default data representation back to "double"
  • The visualization of integers and the nominal statistics calculation are now based on longs instead of integers

Bug fixes

• Fixed MAJOR bug introduced in 4.1beta in example sets / views which occured after a new view was created on top of a splitted example set (e.g. in a cross validation) and has hidden the partition then
• Fixed some problems (due to too much cloned objects, see above) which caused much more memory usage in 4.1beta
• Fixed bug in PredictionTrendAccuracy calculation
• Fixed wrong linefeeds in unix start scripts
• Fixed bug in aggregation function selection of the chart plotters
• Fixed ID handling bug for example sets (views) which prevented the correct application of Id-based operators like the ExampleSetJoin operator
• Fixed bug in table index assignment of view attributes
• Fixed bug in SortedExampleSet
• Fixed bug in some plotters based on JMathplot
• Removed remapId() call in IdUtils which increased the runtime of some clustering schemes (especially DBScan and SupportVectorClustering)
• Fixed bug in RuleLearner for nominal attributes
• Fixed bug for (operator / parameter) pair parameter values for the parameter iteration and optimization operators
• Fixed wrong name for continuous attributes in C45 loader
• ConditionedExampleSet caused some problems if the base attributes for conditions were removed after the filtering
• Fixed a bug in getNominalValue(Attribute) of Example which delivered the first nominal value instead of missing values
• File filters do now accept lower and upper case extensions
• Fixed wrong colors after sorting a column of the ANOVA matrix
• Removed unnecessary statistics registration in nominal attributes consuming unused memory and runtime
• Fixed rounding error in the stepwise parameter operators
• Removed data representation type query during first startup since rounding errors are often too high
• AbsoluteSampling produced sample with duplicates

What's New in RapidMiner Studio 4.1beta [2007/12/02]?

Enhancements

• RapidMiner GPL is renamed to RapidMiner Free and is licensed under the General Public License version 3 (GPLv3) now

• New operators:

  • SingleMacroDefinition
  • MissingValueReplenishmentView
  • Perceptron
  • SugroupDiscovery
  • ExcelExampleSetWriter
  • CSVExampleSetWriter
  • several new data generators

• New preprocessing models for discretization and nominal to binominal filter, these operators now create only a new view on the data as default instead of actually changing the data

• ArffExampleSource and XrffExampleSource now support sampling
• Improved Windows installation
• New icons and look and feel for GPL version
• Added graph visualization for association rules
• Added new filter modes for association rule visualizations
• The non-GPL version now natively supports Oracle, IBM DB2, and Microsoft SQL Server without the need of an additional driver installation
• The availability check for JDBC database drivers was improved, the same applies for the corresponding dialogs
• The database operators and wizards can now work with table and column identifiers containing spaces and other special characters
• Improved performance of DecisionTree and RuleLearner for data sets containing numerical values
• Improved encoding handling for input operators, configuration wizards, and attribute editor
• New default encoding: 'SYSTEM' which uses the standard encoding of the underlying operating system
• All performance criteria now support example weights for calculations if possible (and available)
• New rule evaluation methods available for AssociationRuleGenerator
• Diagonal of confusion matrix is now marked by a different color
• All clustering schemes do now use MixedEuclideanDistance as default
• The chart plotters (pie, bars) are now more robust for larger data sets
• The chart plotters (pie, bars) now provide the possibility for the selection of an aggregation function type and use distinct values only
• KMeans now provides a warning for data sets containing missing values
• The sometimes slightly annoying dialog asking for saving the process can now be deactivated
• Passwords are now encrypted in XML (also in files) ensuring that passwords cannot be read from process files
• New Plotter: Distribution
• Changed operator numbering in operator info dialog for inner operator conditions
• The error messages and the error stack trace in the details frame can now be copied via Ctrl-C
• Data files written by the ExampleSource configuration wizards are now compatible to the standard parameters
• ExampleSource now uses quoted nominal values as default
• New visualization for NaiveBayes models
• Operator trees do now not longer change their expansion status after saving them or after process stops
• Multiple paste operations are now possible after copy
• Decision trees show now the size of leaf nodes through the height of the frequency bar
• More evaluation measures added for association rules
• ExampleSources now also allow the usage of no comment charaters
• Increased the default size for the file chooser and the text dialogs
• Text dialogs like the SQL editor do now keep linefeeds and tab information
• Changed the default minimum support of FPGrowth to 0.95 and added an option to decrease the support until a minimum number of frequent item sets was found. The latter working mode is the default now.
• KMeans cluster models now provide a parallel plotter visualization of the cluster centroids
• New macro: %{v[OpName.ValueName]} which will be replaced by the current value of the specified value of the operator
• Added cross-entropy as a new classification criterion
• Ranges of discretized attributes now contain information about the numerical thresholds
• Changed default criterion for RuleLearner from accuracy to information gain
• Added default data management type to the initialization screen
• Icons for all tabs (non-GPL version)
• Latest Weka version (as of 30/11/2007)
• Implementation Details:
  • New init method also allowing the easy definition of additional operators
  • ParameterSet now provides access to parameter values
  • New views (example sets) in order to improve the integration into other products
  • Changed signature of startCounting(ExampleSet) to startCounting(ExampleSet, boolean) in MeasuredPerformance (see above)
  • All Models now have to return the transformed example set instead of changing the values by side-effect. This was necessary to allow the usage of views and view models

Bug fixes

• Fixed wrong license texts
• Removed the file weka.jar from the free version which was accidentally included in the last release. Weka is of course still part of the GPL version of RapidMiner
• Fixed templates (SimplePerformance was renamed to Performance)
• Fixed example visualization in cluster models (wrong examples were shown in some cases)
• Wizard from Welcome Screen did not change into edit mode
• Faulty wizard files were fixed
• Faulty building block files were fixed
• Fixed bug in the calculation of the confidence of association rules
• Fixed bug if several manual feature construction were applied in a row (overwriting old generated columns)
• Unknown values of nominal attributes were not correctly encoded in Arff files
• Problem with example encoded multivariate series in the MultivariateSeries2WindowExamples operator
• Fixed bug for ranking in TransformedRegression
• Fixed bug in RapidMiner initialization for user defined operators.xml streams
• Configuration Wizard of ExampleSource did not use correct encoding from process root operator
• After deleting the contents of a password field it was still part of the process setup (empty string in XML)
• Changed result set scrolling type to "sensitive" which is necessary for the Microsoft SQL Server 2005
• Fixed bug in XrffExampleSetWriter which did not properly escape XML characters
• Using Save for a ParameterSet result did not work
• Fixed Weka related bugs in the online tutorial
• Fixed a possible stack overflow error in the RepeatUntil meta chain
• Fixed problem with Microsoft SQL Server 2005 with respect to the scrolling / updating behavior
• ProcessLog got an error if the value "best_length" of a feature operator should be logged
• Fixed error in the k-distance plot which calculated a wrong x-axis offset for certain settings
• SparseFormatExampleSource did not trim the sparse array which caused higher memory usages
• Removed data view icon for some of the plotters since an error in a third-party library caused problems after activation
• RuleLearner did not use numerical attributes twice
• Fixed error in attribute editor which has added empty data lines after re-opening the edit dialog

What's New in RapidMiner Studio 4.0 [2007/07/31]?

Enhancements

• New operators:

  • Performance (could be used in most cases instead of the now deprecated PerformanceEvaluator)
  • ClassificationPerformance
  • BinominalClassificationPerformance
  • RegressionPerformance
  • UserBasedPerformance
  • SingleRuleWeighting
  • MPCKMeans

• Almost all process setups will now also correctly work if the nominal values of training and test data are not defined or are not defined in the same order

• The somewhat big operator "PerformanceEvaluator" is now deprecated and was divided into several smaller operators which now fit the different learning task types.
• Added compatibility checks for the example sets for prediction models between training and application data
• Added a filter for the New Operator tab
• Added learning for numerical attributes for rule learners
• Renamed lowest verbosity level to "all"
• Improved visualization of performance criteria
• Added automatical ROC curve visualization for AUC criterion
• Added averaged ROC curves
• Added deviation plotter
• Improved ExampleSetMerge
• Improved rule learning on numerical data sets
• Improved tree learning on numerical data sets
• Added k-distance plot for similarity measures in the similarity visualizations
• Changed AUC calculation to a more pessimistic calculation which better fits the ROC plots
• Operator info is now available in context menu of operator list in new operator tab
• Added example visualizations after clicking a node in the graph view of similarity visualizations
• Improved the speed confidences are set for LibSVM models
• Latest Weka version included (as of 30/07/07)
• Implementation Details:
  • Revised clustering operators and introduced improved abstract clustering
  • The global logging can now be specified either by general properties or via the method LogService.initGlobalLogging(...)
  • Attribute.getStatistics(...) is now deprecated, please use ExampleSet.getStatistics(Attribute, ...) instead
  • Changed the log verbosity of the process informations at the beginning and the end of process executions
  • Plugins can now define own building blocks in their resources directory (each bb file is described by a line in the file "buildingblocks.txt")
  • Improved closing of streams in error cases

Bug fixes

• Removed unnecessary parameters from RandomForest
• Fixed attribute name bug (not case sensitive) causing errors in some preprocessing operators if features with the same name but different cases exists
• Fixed bug in Anova and T-Test calculation (wrong degree of freedom)
• Fixed bug during weight normalization which lead in many cases to a concurrent modification exception which was covered by a process change message
• Removed possible bug in UPGMA-Clustering
• Graph View of Cluster Models did not work
• Added missing clone in discretization operator which might have caused problems in cases where the discretization was added into an iterating chain (like validation chains)
• Streams are now not automatically closed during XML (de-) serialization
• Rule learners did not produce greater equal conditions
• Plotters now can handle missing values for plot columns
• Mikro-averages of attribute weights were not correctly calculated
• Fixed bug if a data set (.aml) is re-loaded containing confidence attributes
• Added missing option for k in the k-distance plots (similarity visualizations)
• Fixed notification error (double beeps) after a process was stopped in a breakpoint
• Fixed a bug which made it impossible to save neural net models

What's New in RapidMiner Studio 4.0beta2 [2007/06/24]?

Enhancements

• New operators:

  • BatchXValidation
  • BatchSlidingWindowValidation
  • AttributeCopy
  • ExampleSetTranspose
  • AssociationRuleGenerator
  • RelevanceTree
  • CHAID
  • Tree2RuleConverter

• Removed operators:

  • RegressionTree (may be re-added in later releases)
  • Ripper (replaced by RuleLearner)

• Renamed operators (old operator names are deprecated now):

  • ExperimentEmbedder operator was renamed to ProcessEmbedder (see below)
  • ExperimentLog operator was renamed to ProcessLog operator (see below)

• API change: Renamed Experiment to Process (the old class Experiment is still available for compatibility reasons but deprecated)

• API change: OperatorService.createOperator(Class) is now the preferred way for operator creation and does no longer need a cast (generics)
• Added correct file encodings to all IO operators
• Renamed log verbosity "minimum" to "all" and log verbosity "maximum" to "off"
• Added meaningful default and range values for the parameters of the ParameterOptimization operators
• Replaced Tip of the Day dialog by the tip in the Welcome screen
• Changed all Weka parameters to non-expert parameters (available in beginners mode)
• SVMWeighting now supports more than 2 classes
• All weighting schemes now return normalized results
• Completely revised tree and rule learners
• Completely revised tree, cluster model, and similarity visualization
• Latest release of LibSVM integrated (2.84)
• Latest release of xstream integrated (1.2.2)
• Latest release of Jung integrated (2.0alpha2)
• Added table view for experiment log results
• Added text views for learned tree models
• Added text views for learner kernel models
• Added text view for logistic regression model
• Added Anova kernels for JMySVM and EvoSVM
• Removed obsolete temp file service
• CommandLineOperator now uses a higher log verbosity for the output of the command
• Improved output of Naive Bayes models
• Improved context menu for attribute editor
• Example visualization now automatically added after IdTagging
• Improved standard example visualization

Bug fixes

• Added missing dialog if more than one special attribute with the same name was defined with the ExampleSource configuration wizard
• Log view panel was not resizable
• Special attributes were no longer special after AttributeSubsetPreprocessing on special attributes
• LibSVM multi class issues fixes (no confidences)
• Bugfix in the fast example set to sparse transformation causing problems in Weka learners (and maybe the LibSVM)
• Dichotomization did not properly work
• Parallel plotter did not properly work for special attributes
• Fixed missing Id problem for top down clusterers
• Fixed wrong nominal value writing for attribute editor
• Column colors were not transferred if columns were moved in data views
• The AttributeConstructionLoader did not properly created attributes for the identical function (no construction at all)
• Normalization did not work properly work on nominal attributes
• AttributeSubsetPreprocessing did not properly keep the old attributes
• Replace operator (context menu) of operator chains added (2) to the inner operators even if the names were not used in the process setup
• Spearman's Rho and Kendall's Tau now deliver 0 if not defined (e.g. for default model) instead of NaN
• Fixed problem with delegate attribute unwrapping in some feature selection cases in combination with cross validation operators

What's New in RapidMiner Studio 4.0beta [2007/05/29]?

Enhancements

• "YALE" was renamed to "RapidMiner"

• New operators:

  • DensityBasedOutlierDetection
  • LOFOutlierDetection
  • DistanceBasedOutlierDetection
  • PCAWeighting
  • SVMWeighting
  • Relief
  • InfoGainWeighting
  • InfoGainRatioWeighting
  • ChiSquaredWeighting
  • SymmetricalUncertaintyWeighting
  • PSOWeighting
  • FPGrowth
  • LinearRegression
  • NaiveBayes
  • NeuralNetLearner
  • LogisticRegression
  • DecisionStump
  • DecisionTree
  • ID3
  • ID3Numerical
  • RegressionTree
  • RandomTree
  • RandomForest
  • Prism
  • Ripper
  • OneR
  • NearestNeighbors
  • AdditiveRegression
  • Stacking
  • Vote
  • MetaCost
  • CostBasedThresholdLearner
  • Binary2MultiClassLearner
  • SVDReduction (from clustering plugin)
  • KMedoids (from clustering plugin)
  • KMeans (from clustering plugin)
  • KernelKMeans (from clustering plugin)
  • SupportVectorClustering (from clustering plugin)
  • AggomerativeClustering (from clustering plugin)
  • AgglomerativeFlatClustering (from clustering plugin)
  • UPGMAClustering (from clustering plugin)
  • TopDownRandomClustering (from clustering plugin)
  • TopDownClustering (from clustering plugin)
  • DBScanClustering (from clustering plugin)
  • RandomFlatClustering (from clustering plugin)
  • ExampleSet2ClusterModel (from clustering plugin)
  • FlattenClusterModel (from clustering plugin)
  • ClusterModel2ExampleSet (from clustering plugin)
  • ExampleSet2Similarity (from clustering plugin)
  • ClusterModel2Similarity (from clustering plugin)
  • SimilarityComparator (from clustering plugin)
  • Bootstrapping
  • WeightedBootstrapping
  • BootstrappingValidation
  • WeightedBootstrappingValidation
  • MissingValueImputation
  • ExampleSetMerge
  • ExampleSetCartesian
  • XrffExampleSource
  • XrffExampleSetWriter
  • DatabaseExampleSetWriter
  • IOSelector
  • LinearCombination
  • AttributeSubsetPreprocessing
  • ModelVisualizer
  • ModelUpdater
  • LabelTrend2Classification
  • Sorting
  • AddNominalValue
  • ExampleRangeFilter
  • Numeric2Polynominal
  • PartialExampleSetLearner
  • SlidingWindowValidation
  • GroupBy
  • GroupedANOVA
  • ANOVAMatrix
  • Aggregation

• Renamed operators:

  • AttributeSetWriter /-Loader into AttributeConstructionsWriter / -Loader
  • Renamed all operators starting with Y- into the names without this prefix
  • Added W- to all Weka operators, old experiments can be loaded though
  • AverageLearner (was deprecated) now revised and renamed into AttributeBasedVote

• Deprecated operators:

  • Numeric2Binary (use Numeric2Binominal instead)

• API CHANGES: please refer to http://sourceforge.net/forum/forum.php?thread_id=1698583&forum_id=390413 and http://sourceforge.net/forum/forum.php?thread_id=1730986&forum_id=390413 for details

• The clustering plugin is now part of the YALE core
• Drag'n'Drop for operator trees
• New Icons (please refer to the license files for informations about the icons)
• New Look and Feel (please refer to the license files for informations about the look and feel)
• Improved general speed, most YALE runs now use less 60% of the runtime needed before
• Added page setup and print preview dialogs
• Improved printing
• New file chooser and added favorites to it (in the left part of the dialog)
• Tool tips can now be painted over multiple lines allowing more informations about the operators and parameters
• New view menu
• Result History viewer showing textual descriptions of all experiment results in the session so far; allows also the calculations of Anova for different results
• Parameter values are now always saved at focus losses or during resizing operations
• All tables (viewers) can be sorted by clicking on the table headers (at least all tables where this makes sense)
• Speed up of plotter initialization which was the reason for the long times needed for displaying data sets
• GUI is now able to immediately stop a running experiment
• Improved capability to use YALE as library which makes necessary that the Ant target "copy-resources" must be performed before starts (see implementation details below)
• All file formats were changed (sorry!) and are now based on XML
• Grid based parameter optimization / iteration operators now support another format for parameter definition: [start;end;step]
• XVPrediction can now also handle confidences for problems with more than two classes
• Improved automatic closing of files and temp file deletion after major experiment changes
• Added graph view for BayesianNet models
• Added textual and graphical view modes for models which are capable of both, e.g. decision trees and Bayesian Nets
• Added possibility to invert the result of an ExampleFilter
• Added possibility to connect several attribute value conditions for an ExampleFilter
• Added new performance criteria: Spearman's rho and Kendall's tau
• Added option for AttributeWeightsApplier allowing for changing just the data view instead of the actual data table
• The data representation type "sparse_array" was renamed to "double_sparse_array"
• Added new data representation types "short_array", "short_sparse_array", and "boolean_sparse_array" allowing for more efficient data handling
• The univariate Series2WindowExamples operator now again supports sets of examples if the time series is encoded as attributes
• The (meta) data tables now support text selection allowing for copy and paste into other applications.
• Performance Vector results can now be selected and copied
• Example Set views can now be selected and copied
• All displayed results now provide a "Save..." button
• Use JTable for confusion matrices
• Use JTable for correlation matrix (DataTable)
• Added HSQLDB JDBC driver
• Full platform compatible line feeds
• ResultWriter can now also write results into single files instead of the global result file defined in experiment
• Improved LearningCurveOperator now using better dynamically growing training sets and a fixed test set
• Allow the definition of number of digits for the ExampleSetWriter format
• Added log scale to usual scatter plotter
• Added several chart plots (new bars 2D and 3D, pie charts 2D and 3D, bubble plotter)
• ExampleSetWriter now support zipped data files
• Added initial support for updatable models, currently only the updatable models from Weka are supported, other will follow
• Added another replenishment type 'zero' for the MissingValueReplenishment operator
• Added source definition for all IO objects, i.e. the results do now show which operator was the creator (only shown in result view if more than one result of the same type was created)
• Allow complete data scan for value type guessing now in ExampleSource configuration wizard
• Added weighted performance measures for weighted means of the per-class recalls and precisions
• Model writing and loading works for zipped files (gz)
• Changed attribute statistics handling and displaying
• Implementation Details:
  • The Ant target "copy-resources" must be performed before starts are possible
  • new initialization methods available Yale.init(...) allowing the specification which parts of YALE should be initialized
  • Revised database access handling. Statements are now always closed
  • changed name of method getVisualisationComponent into getVisualizationComponent
  • no longer necessary to register operators in an experiment (done automatically during adding)
  • no longer necessary to implement the abstract OperatorChain method getNumberOfSteps()
  • Completely revised the example set / attribute / example table data core of YALE which leads to much better implementations of the core classes and more possibilities for extensions. Please refer to the YALE forum for an in-depth description of the changes
  • attribute statistics are now handled in a different way, all statistics are queries now with a statistics name string
  • most actions are now part of own packages
  • replaced shuffled partition building by a version reflecting the way Java shuffles collections
  • improved efficiency of WekaInstancesAdaptor by finding YALE weight attribute only once instead anew for each example
  • removed static field in class Yale for the current experiment
  • The class Main was renamed into YaleCommandLine
  • Added possibility to define default values for attributes
  • BinaryAttribute was renamed to BinominalAttribute
  • Newest versions of all libraries
  • PropertyValueCellEditor can now be registered in PropertyTable allowing plugins to provide new editors for new parameter types
  • The same applies for PropertyKeyCellEditor
  • Averagable: compareTo now implemented in subclasses
  • Averagable: cloneAveragable(Averagable) is now deprecated, please use copy constructors
  • Added ParameterTypeText for longer text inputs
  • XML serialization now uses object streams

Bug fixes

• IOObjectWriter / - Reader did not work for Windows executable due to library typo
• LibSVM regression models could not be saved
• Bugfix in PermutationOperator which uses all attributes of the ExampleTable instead of only using those currently selected in the ExampleSet
• Exception in list property editors after one row was deleted
• Use default GUI properties in cases where loading of properties did not work
• Colons in attribute names were not supported by the AttributeWeightsLoader / -Writer. Replacement by XML format fixes this problem
• Percent (%) in parameter strings were replaced by the method expandString(String) which was not desired The new format for short commands is %{a} now
• new CSV operator which better supports quoting and column separators
• fixed problem for category parameters if the check value was a string of the index number
• fixed bug for number of components = -1 in GHA models
• fixed error for regular attributes with special names when written into sparse format
• Fixed bug for RVM model writing
• Fixed bug for data transformation into the association rule learning format of Weka
• Removed error if a parameter for a non-existing special attribute was in the special format of the ExampleSetWriter

What's New in Yale 3.4 [2006/10/03]?

Enhancements

• New operators:

  • MultivariateSeries2WindowExamples
  • EvolutionaryParameterOptimization
  • IOObjectReader
  • IOObjectWriter
  • AGA
  • YAGGA2
  • SPSSExampleSource
  • ExcelExampleSource
  • LiftChart
  • ROCChart
  • MacroDefinition (see below)

• Removed operators:

  • NelderMeadParameterOptimization
  • PatternSearchParameterOptimization

• Deprecated operators:

  • NaiveBayes, SimpleNaiveBayes, and NaiveBayesUpdateable (replaced by Y-NaiveBayes)
  • LibSVM (use LibSVMLearner instead)

• Changed parameters:

  • DatabaseExampleSource: replaced "driver", "urlprefix", and "databasename" by "database_url" (can be easily defined with help of the new configuration wizard, see below)

• ExampleSource now support zipped data files

• Added new data representations backed up by non-double arrays which will need less memory in case where no double precision is needed
• All IO objects also providing a loading operator are now directly be saveable from the result tab
• SimpleExampleSource is now able to automatically guess the value types

• The Attribute Editor has now some additional features:

  • Context menu on row: "Use row as attribute names" which is nice for example for CSV files
  • Table Menu: "Guess all value types" which re-guesses all value types which might be practical after declaring one of the rows as names
  • Reminder during closing if the data file and attribute description file were not saved before

• New configuration wizards for more sophisticated input operators like ExampleSource or DatabaseExampleSource (available via the "Start configuration wizard..." button of these operators)

• New item in Tools menu "Show database drivers" which lists all available JDBC drivers
• JDBC drivers can now be defined via adding them to the CLASSPATH or by copying them into lib/jdbc
• Free JDBC drivers for MySQL, PostgreSQL, Microsoft SQL Server, and Sybase included
• The file resources/jdbc_properties.xml can be used to define driver dependent settings like URL prefixes etc.
• Improved the directly working on database mode (DatabaseES)
• Improved data saving for ExampleSets
• Added macro definitions. Macros can be defined with the operator MacroDefinition and used with %{my_macro}. Several predefined macros exist like %{experiment_name}, %{experiment_file}, and %{experiment_path}
• The minimum and maximum colors for plotters can now be specified in the properties dialog
• Improved error messages for Weka learners and attribute evaluators
• Density and SOM plotters now support example visualization
• Density and SOM plotters now use buffered images (more efficient)
• Allowing both attribute and example representations for Series 2 Window Examples operators
• Improved logging for both the message viewer and into files
• Improved EvoSVM
• Added several non-psd kernels for JMySVM and LibSVM as well as support for returning the original optimization fitness
• New operator dialog shows now deprecation information
• Generating feature operator do now provide a parameter for the total maximal number of attributes
• PerformanceEvaluator: improved handling of input performances
• Robustified plotters in cases where the given data contain missing values
• An environment variable YALE_OPERATORS_ADDITIONAL will now be regarded and set by the start scripts (for user written operators)
• IOConsume operator now allows deletion type "delete_all_but"
• Implementation Details:
  • the method getInput(Class) of Operator / IOContainer do now deliver the correctly casted instance (no casts necessary any longer)
  • checkIO() of Experiment is now also able to check for given input objects
  • Removed parameter number editors based on JSpinner because of rounding and transformation problems (see below)
  • Installer now uninstalls old versions
  • Windows launcher now allows external classpath settings
  • ExampleSet.getSize() is deprecated now, use size() instead
  • ExampleSet.getExampleReader() is deprecated now, use iterator() instead
  • Deprecation infos are now defined in operator in operator description files

Bug fixes

• Fixed bug in Windows start scripts which did not allow for space in filenames and paths
• Attribute weighting schemes do now provide correct error messages for missing label
• IOContainer reading and writing did not work
• Description of the column separators did not match the actual implementation of ExampleSource and SimpleExampleSource
• Export did not work for unnamed experiments
• Numerical parameter fields rounded to zero for small values (only in YALE 3.3)
• Better error message in case of non-decomposable data sets in RVMLearners
• SOM is now not longer applicable to data sets containing missing values
• In version 3.3 there was a problem introduced if YALE should be started via "java -jar yale.jar" which did no longer work without defining the property yale.home. Should be fixed now
• Additional performance criteria were not stored in XML
• Added missing close statements for database handling, prevent errors if already closed
• Fixed bug during statistics calculation if a column only contains missing values
• Exception was thrown by feature binary generators if the generated value was NaN or infinite
• Fixed LibSVM model application bug for high class skews

What's New in Yale 3.3 [2006/08/04]?

Enhancements

• New operators:
  • Y-AdaBoost
  • Y-Bagging
  • MultiCriterionDecisionStumps
  • RVMLearner
  • Gaussian Process Learner
  • ExperimentEmbedder
  • OperatorEnabler
  • ExampleSetJoin
  • Numeric2Binary
  • Permutation
• Removed operators:
  • JViToPlotter (added most important functionality directly in YALE, other will follow)
• Deprecated operators:
  • RenameAttribute (replaced by ChangeAttributeType and ChangeAttributeName)
• YALE is now available as exe-file for Windows systems
• YALE now provides a Windows installer
• Newest Weka version (CVS from 2006/08/04)
• YALE now provides actual ensemble learners for more than one inner learner
• Search and Replace for XML tab
• Save as "building block" in order to ease future experiment setup
• All validation operators are now able to optionally produce the model of the complete data set
• Changes log verbosity of command line operator from MINIMUM to MAXIMUM
• Overworked all parameter optimization operators
• Double click on operator in tree view now toggle breakpoint status
• Users can specify a search string and capabilities in the new operator dialog now
• New operator dialog is not longer modal and provides an "add" button. This allows for multiple operator insertions without recreating the dialog (and its settings)
• New operator tree properties allowing to filter disabled operators or expansion of the complete tree
• Debug mode which adds a breakpoint after each operator
• Disabled operators are now more clearly marked
• Default file extension for all IO files now
• String property values will no longer be deleted when editing is started, the value will be used after losing the focus
• Added support for automatic parameter optimization of nominal parameters
• Exceptions for feature filter (skip all ... but not ...)
• (Meta) data views are now backed up by tables which are much faster than old HTML views
• Added new (high-dimensional) plotters and jitter function for plotting, overworked old ones
• More intelligent availability checks for plotters and automatic downsampling if number of data points is too high
• Added support for plotting and logging nominal values and parameters
• Data set plotters can now also consider feature weights
• Range of integer parameters now use infinity symbol
• Total number of parameter combinations is now logged (parameter optimization operators)
• (Almost) all randomized operators can now use own local random seeds
• The current memory usage can now be logged as a value of the experiment operator (root)
• All internal kernel based methods now provide the same data and plot view component
• Faster conversion to Weka instances for sparse examples
• Improves parameter guessing for Weka operators
• Improved tutorial and added section about data creation from Java applications
• Implementation Details:
  • new package structure for feature operators
  • new package structure for operators
  • new package structure for GUI
  • new package structure for preprocessing
  • used now JUnit 4.1 for testing
  • code clean-up (no Eclipse-warnings)
  • ExampleTable is an interface now
  • copy-resources is now not longer necessary, plugins have to place their resources in edu/udo/cs/yale/resources
  • Statistics now renamed in DataTable (in new package called datatable)
  • createName(...) of AttributeFactory now handles own counters for each name
  • prepareRun() is now autumatically invoked and must not be invoked any longer before the run of an experiment

Bug fixes

• Validation check did not work in all cases
• escaped XML characters for attribute description file writing
• JMySVM, EvoSVM, MyKLR, and MultiModel cannot be read from files (fixed)
• Result file was not resolved against experiment location
• Tooltips for string parameters did not always have been shown
• Streams for result output were not closed
• Temporary directories are now deleted at the end of experiment if delete_temp_files is set to directly (default)
• Resize bug after changing the name of an operator in tree view
• Fixed problems if two ExampleSetGenerators with the same target function were used in the same experiment
• Removed unnecessary check during loading of sparse examples
• not all operators with inner loops did invoke inApplyLoop()
• Bugfix for IteratingOperatorChain if timeout was -1
• Dynamic parameter %t did not work for filenames under Windows
• At the end of a a Pattern param opt run the result was not properly created
• Windows start scripts did not work if spaces were part of the paths

What's New in Yale 3.2 [2006/04/14]?

Enhancements

• YALE requires now JAVA 1.5 or higher

• New operators:

  • ThresholdCreator
  • AttributeWeightsCreator
  • WeightGuidedFeatureSelection
  • CFSFeatureSetEvaluator
  • ConsistencyFeatureSetEvaluator
  • AttributeCounter
  • WeightedPerformanceCreator
  • CompleteFeatureGeneration
  • Series2WindowExamples
  • TransformedRegression
  • SimpleExampleSource
  • PCA (new version)
  • FastICA
  • GHA
  • ComponentWeights
  • HyperplaneProjection
  • SplitSVMModel
  • RemoveCorrelatedFeatures
  • WeightOptimization
  • TFIDFFilter
  • MinimalEntropyPartitioning
  • EvoSVM
  • PsoSVM
  • EvolutionaryFeatureAggregation
  • PlattScaling
  • SplitChain

• All operator chains now define conditions which must be fulfilled by inner operators.

• New model concept: models which are used for prediction purposes (prediction models) can now be combined with models for preprocessing, e.g. a z-transformation model. This allows for fairer evaluations without using information about the training data which might have been collected during preprocessing.

• Preprocessing models, e.g. a normalization model can be applied with the same parameters on the test set

• Improved Operator Info Screen (F1) which now also shows conditions for inner operators. This eases experiment design for new users

• PerformanceEvaluator adds new criteria to input performance vectors now
• Evolutionary feature operators supports multiobjective optimization now
• Feature operators now allow an arbitrary number of inner operators
• Added new VectorGraphics package (freehep) version 1.2.2
• New Weka version 3.5.2 (current CVS version of Weka)
• The attribute type "string" of Weka is now also supported
• Renamed two parameters of SparseFormatExampleSource: "attributes" is now called "attribute_description_file", "attribute_file" is now called "data_file"
• AUC as a parameter of PerformanceEvaluator instead of ThresholdFinder
• ExampleSetWriter now resolves the relative path of the data file
• Tutorial now reflects the development since Yale 3.0
• More example filter types for ExampleFilter operator
• Added filters for Data View
• Added parameter sample_ratio to example source operators
• Speed up of experiments by preventing IO logging if not necessary
• GUI does not hang any longer after stopping an experiment and a message is shown that the current operator will be finalized
• all regression performance criteria can now handle nominal labels regarding the confidence for the desired true class
• relative_absolute_error now renamed to normalized_absolute_error
• Implementation Details:
  • YALE is now completely type safe, i.e. no warnings occur by compiling with Xlint:unchecked
  • Population operators now work on objects of class Individual instead of directly working on AttributeWeightedExampleSets
  • Added method getSpecialAttribute(String) to ExampleSet interface. This allows a faster retrieval of special attributes
  • UndefinedParameterError will be thrown if an operator asks for the value of a non-optional parameter with no default value and no user defined value
  • The abstract method checkIO of OperatorChain was replaced by getInnerOperatorCondition()
  • Removed deprecated method initApply()
  • added new check method performAdditionalChecks()
  • reworked package structure for feature operators
  • improved memory management for BayesianBoosting
  • Replaced method getValue() of averagables (like performance criteria) by getMikroAverage(). Operators should use getAverage() which returns the makro average if possible and the mikro average otherwise

Bug fixes

• Update of Data View did not properly work
• ThresholdApplier did not properly overwrite the crisp predictions
• error in root mean squared error calculation for data sets with different sizes
• wrong plotting of threshold values in ROC curves
• new operator was not properly selected after replacing an operator via the context menu. Therefore the old parameters were not removed in the GUI
• LibSVM used Math.random() and was therefore not deterministic
• Replace " by " in XML parameter descriptions
• In some cases the variance of a performance criteria became negative. Fixed now.
• Bug in RemoveUselessAttributes since attribute stats were not longer calculated

What's New in Yale 3.1 [2005/11/22]?

Enhancements

• New operators:

  • IOMultiplier
  • PerformanceLoader
  • T-Test
  • Anova
  • DataStatistics (usefull only for command line, see implementation details)

• Removed operators:

  • old parameter based Weka operators (were deprecated)
  • MultipleLabelLearner and MultipleLabelPerformanceEvaluator (please use MultipleLabelIterator instead)

• Drastically reduced runtime (see implementation details)

• Improved attribute editor (added views on data, load series data, icons, nicer error messages)
• Binary classification performance criteria mark the positive class
• Predict confidences for both binominal and polynominal classifications tasks
• Confidences are now automatically set after applying a classification model for all learners, the parameter use_distribution is therefore not longer supported
• ExampleSetWriter can also write prediction confidences now. The dense data format and the special format was slightly adapted to reflect this change
• Attribute ranges can also be specified in meta data view
• Splitted default noise of NoiseOperator in label_noise and default_attribute_noise
• New Weka version 3.4.6 integrated
• Nicer error messages for many data reading problems
• IteratingPerformanceAverage can now handle all types of averagable vectors and also more than one inner performance vectors
• The Yale color plotter shows now a legend with a mapping of the colors to the values for these colors. This also applies for the scatter plot based on the color plotter
• Sanity checks before learning if the used learner can learn from the given data set (using the predefined learner capabilities)
• Uses (p) for initialization probability of feature selection algorithms instead of (1-p)
• The counter for the automatic creation of attribute names is resetted before an experiment will be started
• A new breakpoint type for breakpoints in operator apply loops
• CSVExampleSource now uses the first line for attribute names
• Implementation Details:
  • The position of the Weka Jar file can now be defined via an environment variable WEKA_JAR
  • Removed the construction of attribute weights from example if this is not necessary (this drastically decreases the desired time for example constructions)
  • Improved the calculation of example set statistics
  • Removed the recalculation of attribute statistics after data changes. Statistics are now only calculated if they are needed (including display purposes in the graphical user interface)
  • Attribute is an interface now, different classes of attributes introduced. As a consequence attributes, can only be constructed with help of the AttributeFactory class
  • Added a FastExample2SparseTransform class which provides methods for fast sparse representation creation, especially for SparseArrayDataRows
  • Removed check if an attribute is already part of an example set before it is added. This also improves runtime
  • FilteredExampleSet is now called ConditionedExampleSet
  • Failing during operator initialization (during start up) does not prevent loading the following operators any longer

Bug fixes

• Bugs in SparseArrayDataRow
• Copy of IOContainer was shallow. This bug might have lead to a wrong parameter optimization behavior for complex feature selection experiments
• Implemented missing method in ConditionedExampleSet
• Fixed size bug in ConditionedExampleSet
• Key strokes for cut, copy, and paste did not work
• Syntax highlighting for description tag did not work
• Opening a new experiment kills experiment thread now
• Saving of settings did not always work
• Changing from XML view to other views caused empty status bar
• Error in change detection after modifying the experiment in XML view
• Range update in data view did not work for two changes at the same time

What's New in Yale 3.0 [2005/07/11]?

Enhancements

• New operators:

  • FeatureNameFilter (using regular expressions)
  • FeatureValueTypeFilter (replaces FeatureTypeFilter)
  • FeatureBlockTypeFilter
  • operators for all Weka tasks instead of specifying the Weka operator with a parameter (see below)
  • MultipleLabelLearning
  • MultipleLabelPerformanceEvaluator
  • MultipleLabelIterator
  • AverageBuilder
  • RenameAttribute (renaming and type changing)
  • Data generators for testing purposes
  • MinMaxWrapper for linear combinations of average and minimum values (which might lead to more stable optimizations)
  • CorrelationMatrix (which can also produce feature weights)
  • SimpleBinDiscretization
  • SimpleFrequencyDiscretization
  • Single2Series
  • PerformanceWriter (in addition to the ResultWriter)
  • ParameterCloner
  • ParameterSetWriter
  • GridParameterOptimization (replaces old ParameterOpt.)
  • NelderMeadParameterOptimization
  • PatternParameterOptimization
  • ParameterIteration (which simply iterates through given parameter combinations instead of optimize them)
  • IOConsumer (consumes unused outputs)
  • ARFFWriter
  • WrapperXValidation (replaces old MethodXValidation)
  • SimpleWrapperValidation (replaces old SimpleMethodValidation)
  • NominalExampleSetGenerator
  • JViToPlotter (additional to build in plotters)

• Removed operators:

  • The external operators for the C versions of MySVM, SVMLight, and C45 are not longer part of the Yale core. Please use the Java implementations JMySVM, LibSVM, and J48
  • LegalNumberExampleFilter was replaced by the operator ExampleFilter. This operator can handle both missing values and user defined value conditions
  • MethodXValidation was replaced by WrapperXValidation. The old operator was not able to handle mere feature weighting methods additional to selection
  • ParameterOptimization (see above). In addition, the parameter parameter_file was removed from all parameter optimization operators
  • SimpleMethodValidation (see above)
  • FeatureTypeFilter was replaced by an improved FeatureValueTypeFilter
  • BatchedValidationChain

• Improved data management and statistics. Yale can handle larger data sets now

• Undo and Redo function
• Several new performance criteria including MinMaxCriterion for weighted linear combinations of the minimum and the average of arbitrary criteria
• Some operators are deprecated now. Deprecated operators provide messages during application and validation and should not longer be used
• New plotter concept, introducing Yale color plotter, GnuPlotPlotter for 3D plots, scatter plots, and distribution plotter (histograms). Plots are only automatically created for smaller data sets (settings)
• In addition to the new plotter concept the operator JViToPlotter can be used to plot some of the IOObjects of Yale. The current version at least supports ExampleSet and some numerical models
• Syntax highlighting in message viewer and XML editor, colors can be specified in the preferences dialog
• New Weka version 3.4.5 integrated
• New LibSVM version 2.8 integrated
• Generic operator classes and operator sub types. This allows the building of generic operators with one class for several operators. This feature is used for the new Weka operator style where each learning scheme matches one Yale operator (and not a parameter of an operator)
• Added Learner Capabilities. Each learning scheme can now define which type of data set is supported by the learner
• Added stratified sampling for cross validation on data with a categorical label. This ensures that the subsets provide the same class distribution than the whole data set
• Added several additional selection and crossover schemes for evolutionary feature operators.
• Learners and performance evaluators can now deliver the input example set as output if this is desired. This also applies for models and ModelApplier.
• New structure of settings dialog
• (Optional) Tip of the Day at startup
• Automatical update check during start-up (once in a month, no personal data is transmitted or collected).
• Command line version waits at breakpoints and can be resumed by pressing enter
• Only a user defined amount of lines will be logged, the default is 1000. This value can be changed in the settings dialog
• Since massive logging may slow down experiments the default log verbosity for new experiments is "init"
• Removed some verbosity levels which were not frequently used
• Plugins can also provide a GenericOperatorFactory in their operator description file which can be used to register additional generic operators
• Improved operator group structure in GUI and package structure
• Improved Javadoc documentation, at least all classes should have a class comment
• Learners cannot write the model directly into a file any longer. Please use the operator ModelWriter for this purpose.
• Implementation details:
  • ATTENTION: Since operators should know their own operator description the usage of the empty operator constructor is not longer allowed. Operators must be created with OperatorService.createOperator(String name) The usage of empty operator constructors is not longer allowed for operator creation!
  • Using Arff loader from Weka instead of KDB package
  • Changed the method name getIdAttribute() to getId() in ExampleSet, some methods from Example were removed
  • Added a copy method to Parameters
  • It is now possible to query examples by their id
  • It is also possible to query examples by their index. This is only recommended for memory based example tables and should not be used for iteration purposes. Each operator which must iterate through complete example sets should use ExampleReaders. However, this change allows Yale to construct Weka instances on the fly which drastically decreases memory usage
  • Operators can now define the default behavior for input consumption and a parameter will be automatically defined and queried. This allows that some operators (like validation chains or performance evaluators) can pass their input (the example set for example) to the following operators
  • Added two helper methods getDeliveredOutputClasses() and getAllOutputClasses(Class[] innerOutput). One of these methods should be used to return the delivered output of an operator chain at the end of checkIO(). These methods reflect the consumation behaviour changes. Please refer to the Yale tutorial for further informations.
  • The implementation of the simple feature selection operators was improved. The memory usage is reduced especially in case of forward selection
  • SparseArrayDataRows need less memory than SparseMapDataRows with the same runtime. This datamanagement type should be used if data is sparser than 50%
  • Using sparse array data rows after Nominal2Binary filtering

Bug fixes

• bug in unix start scripts (plugins were not properly loaded)
• variance adaption in feature weighting
• wrong conversion from Weka instances to Yale example sets for data sets with more attributes than examples
• Bug in average handling of validation operators mixed up weights and performance values for some feature operation experiments
• strange plotting of some example sets
• validation of experiments containing disabled operators
• fixed bug in database handling which prevents feature selection to work correctly on example sets based on databases (csv and dBase too)

What's New in Yale 2.4.1 [2004/10/08]?

Enhancements

• New operators:
  • RandomOptimization
• New Weka version 3.4.3 integrated
• The Unix start scripts guess the location for YALE_HOME depending on the location of the script

Bug fixes

• The performance which was delivered by validation chains (only for plotting purposes) was not the average but the last performance. This error was the reason for a wrong plot in the ParameterOptimization sample experiment

What's New in Yale 2.4 [2004/09/20]?

Enhancements

• New operators:

  • LearningCurveOperator,
  • StandardDeviationWeighting
  • PrincipalComponents,
  • WekaAttributeWeighting
  • C45ExampleSource
  • Obfuscator,
  • Deobfuscator
  • CorpusBasedWeighting

• Removed operators: UPGMAClusterer and WekaClusterer are now part of the Clustering plugin

• Changed operators: the former implementation of DecisionTreeLearner was removed since it was not able to produce pruned decision trees. The internal representation of Weka's J48 learner which was formerly known as Y45Learner is now named DecisionTreeLearner.
• Splitting of KDBExampleSource operator in four operators which individually load ARFF, csv, bibtex, and dBase files.
• The parameter "mean_variance_scaling" of the normalization operator is no longer of type category but of type boolean.
• The parameter $v[name] of the special format of ExampleSetWriter can now be used for both regular and special attributes
• accuracy and classification error are now calculated for both binary and multiclass problems. Additionally the confusion matrix is displayed.
• ThresholdFinder can deliver AUC (area under the ROC curve). The maximum number of ROC-points which are plotted is limited to 200.
• All results are presented with the same number of digits
• Forward selection (FeatureSelectionOperator) initially checks if the used attribute are useless, i.e. all values are equal, before it creates a new example set based on this attribute.
• Validation chains which split example sets recalculate the attribute statistics. Therefore for each iteration one data scan is performed. These additional costs are paid to clearify the values and eases the usage of inner operators which make use of the statistics
• Implementation details:
  • recalculation of attribute statistics can be done directly with a method from example set now instead of the example table
  • The method initApply() of operator is now deprecated
  • The method getSpecialAttribute(String) of ExampleSet was removed. Use getAttribute(String) for both regular and special attributes.

Bug fixes

• data writing of the experiment log operator at the end of the experiment
• statistics plot is removed at the beginning of a new experiment
• Y45Learner (now named DecisionTreeLearner) did not allow to create unpruned trees
• newline at the end of data files can now be omitted

What's New in Yale 2.3.3 [2004/08/20]

Enhancements

• New operators:
  • IteratingOperatorChain
• Some new target functions for the ExampleSetGenerator
• With %b the apply count value plus 1 can be asked in a parameter string (%b% will be resolved to %a + 1)
• Bayesian Boosting now supports internal bootstrapping and provides the performance values to plot them with the experiment log operator
• Weka models are now displayed in the message viewer and log files
• Allow environment variable definition of the maximal used memory in Windows start scripts (like the unix scripts)
• Some tutorial additions

Bug fixes

• Exception in toString() of tree
• wrong command line construction for C45Learner
• bug in status bar which increases CPU usage (low priority) and does not show the correct operator
• removal of nominal attributes in feature selection experiments

What's New in Yale 2.3.2 [2004/07/12]?

Enhancements

• New operators:

  • ExampleSetGenerator

• Weighted mutation can be bounded between 0 and 1.

• Scaling of the ROC curve plotted by the threshold finding operator.

Bug fixes

• Internal change of representation for nominal attribute values. This guarantees the same order for nominal values when writing a attribute description file and reloading it.

What's New in Yale 2.3.1 [2004/07/08]?

Enhancements

• New operators:
  • Sampling
  • BayesianBoosting
  • ThresholdFinder
  • ThresholdApplier
  • ExampleVisualizer
• Examples with Id can now be displayed from the plotter by double clicking the example. Therefore a ExampleVisualization operator must have been added.
• Pressing the delete key removes the selected operator from the operator tree

Bug fixes

• Settings dialog displays correct default values at startup.

What's New in Yale 2.3 [2004/06/22]?

Enhancements

• New operators:
  • AttributeValueMapping
  • AverageLearner
  • LearnerFeatureGeneration (to create attributes from the predictions of different learning schemes)
  • RemoveUselessAttributes
• Removed operators:
  • ExampleSetInfo (use RemoveUselessAttributes instead)
  • ModelContainerLearner (use LearnerFeatureGeneration)
  • Concept Drift operators (in plugin now)
• New online Tutorial available in help menu
• Zooming functionality for all 2D plotters. Simply drag a rectangle to zoom into the selected region. Right clicking sets the range to maximum size.
• Added user descriptions (comments) which can be edited in the operator info screen (F1). The description of the root operator is shown after loading an experiment. This can be set disabled in the settings dialog.
• Expert and Beginner modes added. In expert mode all parameters are shown. In the beginner mode only important parameters.
• Save as Template added. Experiments which were saved as template can be used by the wizard.
• Using the LearnerFeatureGeneration produces a new example set containing the model predictions as attributes. Another learning scheme can be used to learn from this values a meta model. Alternatively the new AverageLearner can simply calculate the average of the predictions which is especially useful in a selection or weighting wrapper.
• Implementation details:
  • new packages in operator and learner packages

Bug fixes

• FixedSplitValidationChain delivered not the defined absolute number of examples
• Problems with classification tasks and Weka learners due to Weka's new internal representation.

What's New in Yale 2.2 [2004/06/01]?

Enhancements

• New operators:

  • AttributeSetLoader (instead of FeatureGenerationOperator)
  • ModelWriter
  • Y45
  • WekaMetaLearner
  • ModelContainerLearner
  • NoiseOperator
  • FourierTransform
  • Java versions of MySVM and MyKLR

• AttributeSetWriter uses new format to allow the weighting of attributes after loading and constructing them:

      name::construction_description
  

• Operators can now be disabled

• Weighting vector of JMySVM now delivered for linear kernels. JMySVM can also deliver xi alpha estimation of performance now
• Interface Learner added, former learner super class is now abstract
• Weka independent internal implementation of J48 added for own adaptions
• Weka meta learning schemes can be designed in two ways: With the known WekaLearner operator and by specifying parameters and, now, by specifying them as operator chains. This allows the same representation for all Yale meta learning schemes with internal learning operators as children
• Meta learner schemes can be used to create new attributes from the predictions of learned models
• new system for objects which can be averaged like performance criteria or weights
• example sets are displayed in table view or plot view, the same applies for models of JMySVM learners

Bug fixes

• Exception in unbalanced crossover
• unused IO objects will not longer be doubled by the usage of simple operator chains

What's New in Yale 2.1.1 [2004/04/16]?

• Weka version 3.4.1 included. Since many of the learners are now part of a new package, it might be necessary to adapt the weka class names in your experimentfiles.
• YaleIdMapping included. May be part of example sets in future releases.
• Breakpoints are now saved.

What's New in Yale 2.1 [2003/12/17]?

• New operators:
  • IdTagging
  • InfiniteValueReplenishment
  • InteractiveFeatureWeighting
  • AttributeWeightsWriter
  • AttributeWeightsLoader
  • AttributeWeightsApplier for different weight functions
  • Attribute2RealValues
  • AttributeWeightSelection
• Support for Word Vector Tool, Value Series Preprocessing, and Clustering plugin
• The definition of a label attribute in cases where the data contains no label but should get a predicted one is no longer necessary
• attribute selection is now seen as attribute weighting which allows more flexible operators. Feature operators like forward selection, genetic algorithms and the weighting operators can now deliver an example set with the selection / weighting already applied or the original example set (optional). Therefore all feature operators delivers the new IO object "AttributeWeights", not only the weighting ones. A weight of 0 means, that the attribute should be deselected
• more than one additional operator description file can be specified with the -Dyale.operators.additional option by using the system dependant path separator (e.g. ":" on Unix systems)
• Settings dialog

Bug fixes

• cut and paste bug fixed
• sometimes data columns and headers in attribute editor did not match. Fixed.

What's New in Yale 2.0.3 [2003/12/17]?

• Added parameter additional_performance_criteria to PerformanceEvaluator for specifying user-defined performance criteria

What's New in Yale 2.0.2 [2003/11/20]?

Enhancements

• Error estimation for MultiClassLearnerByRegression

Bug fixes

• Attribute editor combo box did not respond to attribute type changes

What's New in Yale 2.0.1 [2003/10/22]?

Enhancements

• New operators:
  • MultiClassLearnerByRegression

• %-expansion in parameter values:

  • %a replaced by number of times, the operator was applied
  • %t replaced by current system time
  • %n replaced by name of operator
  • %c replaced by class of operator

• "Replace operator" context menu added

• Replaced kxml by Java XML parsers
• Removed DirectedGeneratingGeneticAlgorithm (DGGA)

Bug fixes

• GUI used to hang when stopping experiment at breakpoint

What's New in Yale 2.0 [2003/08/28]?

• New operators:

  • DefaultLearner
  • WekaAssociationLearner
  • QuadraticParameterOptimization
  • GNUPlotOperator
  • ConceptDriftAdaptor
  • ForwardWeighting
  • EvolutionaryWeighting
  • UPGMA (tree clusterer)
  • BatchedValidationChain
  • ExampleSetInformation

• Added attribute weighting

• Added plugin support.
• SVMLearner does not automatically remove NaN examples. (This feature was actually never documented). Use ExampleFilter to remove NaNs instead.
• Added gnuplot support for GUI; added GNUPlotOperator
• Operator 'ConceptDriftAdaptor' added for experiments where the data used for a classification task has a concept drift in the concept to be learned. While the concept drifts in experiments performed with the 'ConceptDriftSimulator' are artificially simulated, the 'ConceptDriftAdaptor' handles data with real concept drift (and does not generate any additional artificial drift).
• Allowed arbitrary names for special attributes.

What’s New in Yale 2.0 beta 2 [2003/06/18]?

• Operators for concept drift simulation experiments and several time window management and example weighting approaches were added (see operators "ConceptDriftSimulator", "BatchWindowLearner", "BatchWeightLearner").
• Renamed global experiment parameter 'keep_temp_files' to 'delete_temp_files'.
• LegalNumberExampleFilter replaced by more general operator ExampleFilter. By implementing ConditionExampleReader.Condition users can specify arbitrary conditions.
• SparseFormatExampleSource: New parameter "attributes" allows for an attribute description file similar to the ExampleSource. If the old behaviour is desired, the parameter "format" must be set to "separate_file".
• DatabaseExampleSource: Separate query file replaced by new parameters ("username", "databasename", ...). In case of long queries the query (and only the query) can still be read from a separate file (still specified by "query_file"). If the password should not be written to the config file, it is queried when needed. Yale can now directly work on databases without copying the data to memory first (alpha version!!!). If this behavior is desired, the parameter "work_on_databases" must be set to true and the parameter "table_name" must be the name of an existing table. Be careful with this option since it will change the database.
• FeatureGeneration: New parameter list "functions" allows specification of attribute generation and selection in config file. Was formerly specified in separate file (still working).
• ExampleSetWriter: Output in sparse format and arbitrary user defined format now possible.
• PerformanceEvaluator: "comparator_class" allows for user defined comparators of performance measures
• Performance criteria measure micro and makro average and variance.
• Special "id" attribute now supported ( tag in attribute description files).
• Memory of unused attributes (e.g. intermediately generated attributes, predicted labels in crossvalidations) freed.
• Weka models can now be displayed graphically.
• Implementation details:
  • JUnit tests added
  • UserError introduced and exception handling improved.
  • Refactoring eases extensibility for user defined custom operators.
  • Tutorial operator description automatically generated from the JavaDoc comments in the operator source code and the operator self description.

What's New in Yale 2.0 beta [2003/03/12]?

• Graphical User Interface (GUI) added.
• Configuration file '~/.yalerc' moved to '~/.yale/yalerc', together with some other configuration files.
• Root operators (= outer most operators) in experiments must now be of class "Experiment".

• The "group" attribute of the tags was replaced by the

    <list> tag, e.g.:
      <list>
        <parameter key="key1" value="value1"/>
    ...
       <parameter key="keyN" value="valueN"/>
      </list>
  

• All model applier operators were replaced by a single "ModelApplier" operator for all models.

• The "parentlookup" attribute of tags is obsolete.
• The operator "SVMLearner" was renamed to "MySVMLearner" (because Yale does not only support the mySVM by Stefan Rueping as the only SVM implementation, but also supports the implementations SVM^light by Thorsten Joachims and LibSVM by Chih-Chung Chang and Chih-Jen Lin).
• Some parameters were renamed (which can be easily checked in the GUI).
  • PerformanceEvaluator: 'criteria_list' replaced by boolean parameters
  • Experiment: 'tmp_dir' renamed to 'temp_dir'

Yale 1.0 [2002/06/19]

• Initial public release of the machine learning environment Yale (Yet Another Learning Environment).