com.wcohen.ss
Class DirichletJS

java.lang.Object
  com.wcohen.ss.AbstractStringDistance
      com.wcohen.ss.AbstractTokenizedStringDistance
          com.wcohen.ss.JensenShannonDistance
              com.wcohen.ss.DirichletJS

All Implemented Interfaces:

StringDistance, StringDistanceLearner

public class DirichletJS
extends JensenShannonDistance

Jensen-Shannon distance of two unigram language models, smoothed using Dirichlet prior.

Field Summary

Fields inherited from class com.wcohen.ss.AbstractTokenizedStringDistance

tokenizer

Constructor Summary

DirichletJS()

DirichletJS(Tokenizer tokenizer, double pseudoCount)

Method Summary

double	getPseudoCount()
static void	main(java.lang.String[] argv)
void	setPseudoCount(double c)
void	setPseudoCount(java.lang.Double c)
protected double	smoothedProbability(Token tok, double freq, double totalWeight) smoothed probability of the token
java.lang.String	toString()

Methods inherited from class com.wcohen.ss.JensenShannonDistance

backgroundProb, explainScore, prepare, score, train

Methods inherited from class com.wcohen.ss.AbstractTokenizedStringDistance

asBagOfTokens, prepare, setStringWrapperPool

Methods inherited from class com.wcohen.ss.AbstractStringDistance

addExample, doMain, explainScore, getDistance, hasNextQuery, nextQuery, prepare, score, setDistanceInstancePool

Methods inherited from class java.lang.Object

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

Constructor Detail

DirichletJS

public DirichletJS(Tokenizer tokenizer,
                   double pseudoCount)

DirichletJS

public DirichletJS()

Method Detail

getPseudoCount

public double getPseudoCount()

setPseudoCount

public void setPseudoCount(double c)

setPseudoCount

public void setPseudoCount(java.lang.Double c)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

smoothedProbability

protected double smoothedProbability(Token tok,
                                     double freq,
                                     double totalWeight)

smoothed probability of the token

Specified by:

smoothedProbability in class JensenShannonDistance

main

public static void main(java.lang.String[] argv)