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

Class EuclideanDistanceSimilarity

java.lang.Object

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

All Implemented Interfaces:

VectorSimilarityMeasure

public class EuclideanDistanceSimilarity
extends Object
implements VectorSimilarityMeasure

Field Summary

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

NO_NORM

Constructor Summary

Constructors

Constructor and Description
EuclideanDistanceSimilarity()

Method Summary

Modifier and Type	Method and Description
double	aggregate(double valueA, double nonZeroValueB)
boolean	consider(int numNonZeroEntriesA, int numNonZeroEntriesB, double maxValueA, double maxValueB, double threshold)
double	norm(Vector vector)
Vector	normalize(Vector vector)
double	similarity(double dots, double normA, double normB, int numberOfColumns)

Methods inherited from class java.lang.Object

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

Constructor Detail

EuclideanDistanceSimilarity

public EuclideanDistanceSimilarity()

Method Detail

normalize

public Vector normalize(Vector vector)

Specified by:

normalize in interface VectorSimilarityMeasure

norm

public double norm(Vector vector)

Specified by:

norm in interface VectorSimilarityMeasure

aggregate

public double aggregate(double valueA,
                        double nonZeroValueB)

Specified by:

aggregate in interface VectorSimilarityMeasure

similarity

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

Specified by:

similarity in interface VectorSimilarityMeasure

consider

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

Specified by:

consider in interface VectorSimilarityMeasure