cc.mallet.types
Class NormalizedDotProductMetric

java.lang.Object
  cc.mallet.types.NormalizedDotProductMetric

All Implemented Interfaces:

CachedMetric, Metric

public class NormalizedDotProductMetric
extends java.lang.Object
implements CachedMetric

Computes 1 - [ / sqrt (*)] aka 1 - cosine similarity

Constructor Summary

NormalizedDotProductMetric()

Method Summary

double	distance(SparseVector a, int hashCodeA, SparseVector b, int hashCodeB)
double	distance(SparseVector a, SparseVector b)

Methods inherited from class java.lang.Object

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

Constructor Detail

NormalizedDotProductMetric

public NormalizedDotProductMetric()

Method Detail

distance

public double distance(SparseVector a,
                       SparseVector b)

Specified by:

distance in interface Metric

distance

public double distance(SparseVector a,
                       int hashCodeA,
                       SparseVector b,
                       int hashCodeB)

Specified by:

distance in interface CachedMetric