com.rapidminer.operator.learner.tree
Class GiniIndexCriterion

java.lang.Object
  com.rapidminer.operator.learner.tree.AbstractCriterion
      com.rapidminer.operator.learner.tree.GiniIndexCriterion

All Implemented Interfaces:

Criterion

public class GiniIndexCriterion
extends AbstractCriterion

Calculates the Gini index for the given split.

Author:

Ingo Mierswa

Field Summary

Fields inherited from class com.rapidminer.operator.learner.tree.AbstractCriterion

labelAttribute, leftLabelWeights, leftWeight, rightLabelWeights, rightWeight, totalLabelWeights, totalWeight, weightAttribute

Constructor Summary

GiniIndexCriterion()

Method Summary

double	getBenefit(double[][] weightCounts)
double	getIncrementalBenefit()
double	getNominalBenefit(ExampleSet exampleSet, Attribute attribute)
double	getNumericalBenefit(ExampleSet exampleSet, Attribute attribute, double splitValue)
boolean	supportsIncrementalCalculation()

Methods inherited from class com.rapidminer.operator.learner.tree.AbstractCriterion

startIncrementalCalculation, swapExample

Methods inherited from class java.lang.Object

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

Constructor Detail

GiniIndexCriterion

public GiniIndexCriterion()

Method Detail

getNominalBenefit

public double getNominalBenefit(ExampleSet exampleSet,
                                Attribute attribute)

getNumericalBenefit

public double getNumericalBenefit(ExampleSet exampleSet,
                                  Attribute attribute,
                                  double splitValue)

getBenefit

public double getBenefit(double[][] weightCounts)

supportsIncrementalCalculation

public boolean supportsIncrementalCalculation()

Specified by:

supportsIncrementalCalculation in interface Criterion

Overrides:

supportsIncrementalCalculation in class AbstractCriterion

getIncrementalBenefit

public double getIncrementalBenefit()

Specified by:

getIncrementalBenefit in interface Criterion

Overrides:

getIncrementalBenefit in class AbstractCriterion