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

Class CountbasedMeasure

java.lang.Object

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

All Implemented Interfaces:

VectorSimilarityMeasure

Direct Known Subclasses:

CityBlockSimilarity, CooccurrenceCountSimilarity, LoglikelihoodSimilarity, TanimotoCoefficientSimilarity

public abstract class CountbasedMeasure
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
CountbasedMeasure()

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)

Methods inherited from class java.lang.Object

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

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

similarity

Constructor Detail

CountbasedMeasure

public CountbasedMeasure()

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

consider

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

Specified by:

consider in interface VectorSimilarityMeasure