com.wcohen.ss
Class Mixture

java.lang.Object
  com.wcohen.ss.AbstractStringDistance
      com.wcohen.ss.AbstractTokenizedStringDistance
          com.wcohen.ss.AbstractStatisticalTokenDistance
              com.wcohen.ss.Mixture

All Implemented Interfaces:

StringDistance, StringDistanceLearner

public class Mixture
extends AbstractStatisticalTokenDistance

Mixture-based distance metric.

Field Summary

Fields inherited from class com.wcohen.ss.AbstractStatisticalTokenDistance

collectionSize, documentFrequency, totalTokenCount

Fields inherited from class com.wcohen.ss.AbstractTokenizedStringDistance

tokenizer

Constructor Summary

Mixture()

Mixture(Tokenizer tokenizer)

Method Summary

java.lang.String	explainScore(StringWrapper s, StringWrapper t) Explain how the distance was computed.
static void	main(java.lang.String[] argv)
double	score(StringWrapper s, StringWrapper t) Distance is argmax_lambda prod_{w in s} lambda Pr(w|t) * (1-lambda) Pr(w|background).
java.lang.String	toString()

Methods inherited from class com.wcohen.ss.AbstractStatisticalTokenDistance

checkTrainingHasHappened, getDocumentFrequency, 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, prepare, score, setDistanceInstancePool

Methods inherited from class java.lang.Object

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

Constructor Detail

Mixture

public Mixture(Tokenizer tokenizer)

Mixture

public Mixture()

Method Detail

score

public double score(StringWrapper s,
                    StringWrapper t)

Distance is argmax_lambda prod_{w in s} lambda Pr(w|t) * (1-lambda) Pr(w|background). This is computed with E/M.

Specified by:

score in interface StringDistance

Specified by:

score in class AbstractStringDistance

explainScore

public java.lang.String explainScore(StringWrapper s,
                                     StringWrapper t)

Explain how the distance was computed. In the output, the tokens in S and T are listed, and the common tokens are marked with an asterisk.

Specified by:

explainScore in interface StringDistance

Specified by:

explainScore in class AbstractStringDistance

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

main

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