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

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.RussellRaoNominalSimilarity

All Implemented Interfaces:

java.io.Serializable

public class RussellRaoNominalSimilarity
extends AbstractNominalSimilarity

Implements the Russell-Rao similarity for nominal attributes.

Author:

Michael Wurst, Sebastian Land

See Also:

Serialized Form

Constructor Summary

RussellRaoNominalSimilarity()

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.

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, isSimilarity

Methods inherited from class java.lang.Object

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

Constructor Detail

RussellRaoNominalSimilarity

public RussellRaoNominalSimilarity()

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