Class BasicModelG
- java.lang.Object
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- org.apache.lucene.search.similarities.BasicModel
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- org.apache.lucene.search.similarities.BasicModelG
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public class BasicModelG extends BasicModel
Geometric as limiting form of the Bose-Einstein model. The formula used in Lucene differs slightly from the one in the original paper:Fis increased by1andNis increased byF.- WARNING: This API is experimental and might change in incompatible ways in the next release.
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Constructor Summary
Constructors Constructor Description BasicModelG()Sole constructor: parameter-free
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Explanationexplain(BasicStats stats, double tfn, double aeTimes1pTfn)Returns an explanation for the score.doublescore(BasicStats stats, double tfn, double aeTimes1pTfn)Returns the informative content score combined with the after effect, more specificallyinformationContentScore * aeTimes1pTfn / (1 + tfn).StringtoString()Subclasses must override this method to return the code of the basic model formula.
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Method Detail
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score
public final double score(BasicStats stats, double tfn, double aeTimes1pTfn)
Description copied from class:BasicModelReturns the informative content score combined with the after effect, more specificallyinformationContentScore * aeTimes1pTfn / (1 + tfn). This function must be non-decreasing withtfn.- Specified by:
scorein classBasicModel
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explain
public Explanation explain(BasicStats stats, double tfn, double aeTimes1pTfn)
Description copied from class:BasicModelReturns an explanation for the score. Subclasses must override this method.- Specified by:
explainin classBasicModel
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toString
public String toString()
Description copied from class:BasicModelSubclasses must override this method to return the code of the basic model formula. Refer to the original paper for the list.- Specified by:
toStringin classBasicModel
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