Remove Unused Values
(AI Studio Core)
Synopsis
This operator will remove each nominal value that is not assigned to any example.Description
This operator will remove each nominal value that is not assigned to any example. For reproducing this step during application time, you can apply the returned preprocessing model. If unknown nominal values will occur during application time, they will be set to missing. Please keep that in mind.
Additionally you can select if the kept nominal values should be sorted alphabetically. This can be used for plotting purpose.
Input
example set (IOObject)This is an example set input port
Output
- example set (Data Table)
This is an example set output port
- original (Data Table)
The input without any modifications.
preprocessing model (Preprocessing Model)
Parameters
- attribute filter typeThe condition specifies which attributes are selected or affected by this operator.
- attributeThe attribute which should be chosen.
- attributesThe attribute which should be chosen.
- regular expressionA regular expression for the names of the attributes which should be kept.
- use except expressionIf enabled, an exception to the specified regular expression might be specified. Attributes of matching this will be filtered out, although matching the first expression.
- except regular expressionA regular expression for the names of the attributes which should be filtered out although matching the above regular expression.
- value typeThe value type of the attributes.
- use value type exceptionIf enabled, an exception to the specified value type might be specified. Attributes of this type will be filtered out, although matching the first specified type.
- except value typeExcept this value type.
- block typeThe block type of the attributes.
- use block type exceptionIf enabled, an exception to the specified block type might be specified.
- except block typeExcept this block type.
- numeric conditionParameter string for the condition, e.g. '>= 5'
- invert selectionIndicates if only attributes should be accepted which would normally filtered.
- include special attributesIndicate if this operator should also be applied on the special attributes. Otherwise, they are always kept.
- sort alphabeticallyIf checked, the resulting mapping will be sorted alphabetically.