com.rapidminer.tools.math.similarity.nominal
Class JaccardNominalSimilarity

java.lang.Object
  com.rapidminer.tools.math.similarity.DistanceMeasure
      com.rapidminer.tools.math.similarity.SimilarityMeasure
          com.rapidminer.tools.math.similarity.nominal.AbstractNominalSimilarity
              com.rapidminer.tools.math.similarity.nominal.JaccardNominalSimilarity

All Implemented Interfaces:

java.io.Serializable

public class JaccardNominalSimilarity
extends AbstractNominalSimilarity

Implements the Dice similarity for nominal attributes.

Author:

Sebastian Land, Michael Wurst

See Also:

Serialized Form

Constructor Summary

JaccardNominalSimilarity()

Method Summary

protected double	calculateSimilarity(double equalNonFalseValues, double unequalValues, double falseValues) Calculate a similarity given the number of attributes for which both examples agree/disagree.
java.lang.String	toString()

Methods inherited from class com.rapidminer.tools.math.similarity.nominal.AbstractNominalSimilarity

calculateDistance, calculateSimilarity, init

Methods inherited from class com.rapidminer.tools.math.similarity.SimilarityMeasure

isDistance

Methods inherited from class com.rapidminer.tools.math.similarity.DistanceMeasure

calculateDistance, calculateDistance, calculateSimilarity, calculateSimilarity, init, init, installAdditionalPorts, isSimilarity, uninstallAdditionalPorts

Methods inherited from class java.lang.Object

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

Constructor Detail

JaccardNominalSimilarity

public JaccardNominalSimilarity()

Method Detail

calculateSimilarity

protected double calculateSimilarity(double equalNonFalseValues,
                                     double unequalValues,
                                     double falseValues)

Description copied from class: AbstractNominalSimilarity

Calculate a similarity given the number of attributes for which both examples agree/disagree.

Specified by:

calculateSimilarity in class AbstractNominalSimilarity

Parameters:

equalNonFalseValues - the number of attributes for which both examples are equal and non-zero

unequalValues - the number of attributes for which both examples have unequal values

falseValues - the number of attributes for which both examples have zero values

Returns:

the similarity

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object