Class BasicModelP

Implements the Poisson approximation for the binomial model for DFR.

Note

This API is experimental and might change in incompatible ways in the next release.

WARNING: for terms that do not meet the expected random distribution (e.g. stopwords), this model may give poor performance, such as abnormally high scores for low tf values.

Inheritance
System.Object
BasicModel
BasicModelP
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Search.Similarities
Assembly: Lucene.Net.dll
Syntax
public class BasicModelP : BasicModel

Constructors

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BasicModelP()

Sole constructor: parameter-free

Declaration
public BasicModelP()

Fields

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LOG2_E

log2(Math.E), precomputed.

Declaration
protected static double LOG2_E
Field Value
Type Description
System.Double

Methods

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Score(BasicStats, Single)

Declaration
public sealed override float Score(BasicStats stats, float tfn)
Parameters
Type Name Description
BasicStats stats
System.Single tfn
Returns
Type Description
System.Single
Overrides
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ToString()

Declaration
public override string ToString()
Returns
Type Description
System.String
Overrides