com.rapidminer.operator.preprocessing.filter.attributes
Class NominalAttributeFilter

java.lang.Object
  com.rapidminer.operator.preprocessing.filter.attributes.AbstractAttributeFilterCondition
      com.rapidminer.operator.preprocessing.filter.attributes.NominalAttributeFilter

All Implemented Interfaces:

AttributeFilterCondition

public class NominalAttributeFilter
extends AbstractAttributeFilterCondition

This class implements the condition if an attribute is nominal. All non-nominal attributes will be removed.

Author:

Sebastian Land, Ingo Mierswa

Nested Class Summary

Nested classes/interfaces inherited from interface com.rapidminer.operator.preprocessing.filter.attributes.AttributeFilterCondition

AttributeFilterCondition.ScanResult

Constructor Summary

NominalAttributeFilter()

Method Summary

AttributeFilterCondition.ScanResult

beforeScanCheck(Attribute attribute) This method initializes this condition and resets all counters.

Methods inherited from class com.rapidminer.operator.preprocessing.filter.attributes.AbstractAttributeFilterCondition

check, checkAfterFullScan, getParameterTypes, init, isNeedingFullScan, isNeedingScan

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NominalAttributeFilter

public NominalAttributeFilter()

Method Detail

beforeScanCheck

public AttributeFilterCondition.ScanResult beforeScanCheck(Attribute attribute)
                                                    throws UserError

Description copied from interface: AttributeFilterCondition

This method initializes this condition and resets all counters. It returns REMOVE, if the attribute can be removed without checking examples. If it has been removed, no checking during examples will occur. If it returns UNCHECKED, this Attribute Filter needs a full check and hence the attribute cannot be deleted or kept. Distinguishing this is important, because of the inverting, which otherwise might remove attributes although they only have been kept for later checking.

Parameters:

attribute - this is the attribute, the filter will have to check for.

Throws:

UserError