com.wcohen.ss

Class JelinekMercerJS

java.lang.Object

com.wcohen.ss.AbstractStringDistance

com.wcohen.ss.AbstractTokenizedStringDistance

com.wcohen.ss.JensenShannonDistance

com.wcohen.ss.JelinekMercerJS

All Implemented Interfaces:

StringDistance, StringDistanceLearner

public class JelinekMercerJS
extends JensenShannonDistance

Jensen-Shannon distance of two unigram language models, smoothed using Jelinek-Mercer mixture model.

Field Summary

Fields inherited from class com.wcohen.ss.AbstractTokenizedStringDistance

tokenizer

Constructor Summary

Constructors

Constructor and Description
JelinekMercerJS()
JelinekMercerJS(Tokenizer tokenizer, double lambda)

Method Summary

Modifier and Type	Method and Description
double	getLambda()
static void	main(String[] argv)
void	setLambda(double lambda)
void	setLambda(Double lambda)
protected double	smoothedProbability(Token tok, double freq, double totalWeight) smoothed probability of the token
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

JelinekMercerJS

public JelinekMercerJS(Tokenizer tokenizer,
                       double lambda)

JelinekMercerJS

public JelinekMercerJS()

Method Detail

getLambda

public double getLambda()

setLambda

public void setLambda(double lambda)

setLambda

public void setLambda(Double lambda)

smoothedProbability

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

smoothed probability of the token

Specified by:

smoothedProbability in class JensenShannonDistance

toString

public String toString()

Overrides:

toString in class Object

main

public static void main(String[] argv)