Class Distribution
- java.lang.Object
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- org.apache.lucene.search.similarities.Distribution
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- Direct Known Subclasses:
DistributionLL
,DistributionSPL
public abstract class Distribution extends java.lang.Object
The probabilistic distribution used to model term occurrence in information-based models.- See Also:
IBSimilarity
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Constructor Summary
Constructors Constructor Description Distribution()
Sole constructor.
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description Explanation
explain(BasicStats stats, double tfn, double lambda)
Explains the score.abstract double
score(BasicStats stats, double tfn, double lambda)
Computes the score.abstract java.lang.String
toString()
Subclasses must override this method to return the name of the distribution.
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Method Detail
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score
public abstract double score(BasicStats stats, double tfn, double lambda)
Computes the score.
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explain
public Explanation explain(BasicStats stats, double tfn, double lambda)
Explains the score. Returns the name of the model only, since bothtfn
andlambda
are explained elsewhere.
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toString
public abstract java.lang.String toString()
Subclasses must override this method to return the name of the distribution.- Overrides:
toString
in classjava.lang.Object
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