org.apache.mahout.math.hadoop.similarity.cooccurrence.measures

Class TanimotoCoefficientSimilarity

java.lang.Object

org.apache.mahout.math.hadoop.similarity.cooccurrence.measures.CountbasedMeasure

org.apache.mahout.math.hadoop.similarity.cooccurrence.measures.TanimotoCoefficientSimilarity

All Implemented Interfaces:

VectorSimilarityMeasure

public class TanimotoCoefficientSimilarity
extends CountbasedMeasure

Field Summary

Fields inherited from interface org.apache.mahout.math.hadoop.similarity.cooccurrence.measures.VectorSimilarityMeasure

NO_NORM

Constructor Summary

Constructors

Constructor and Description
TanimotoCoefficientSimilarity()

Method Summary

Modifier and Type	Method and Description
boolean	consider(int numNonZeroEntriesA, int numNonZeroEntriesB, double maxValueA, double maxValueB, double threshold)
double	similarity(double dots, double normA, double normB, int numberOfColumns)

Methods inherited from class org.apache.mahout.math.hadoop.similarity.cooccurrence.measures.CountbasedMeasure

aggregate, norm, normalize

Methods inherited from class java.lang.Object

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

Constructor Detail

TanimotoCoefficientSimilarity

public TanimotoCoefficientSimilarity()

Method Detail

similarity

public double similarity(double dots,
                         double normA,
                         double normB,
                         int numberOfColumns)

consider

public boolean consider(int numNonZeroEntriesA,
                        int numNonZeroEntriesB,
                        double maxValueA,
                        double maxValueB,
                        double threshold)

Specified by:

consider in interface VectorSimilarityMeasure

Overrides:

consider in class CountbasedMeasure