Class LambdaDF

Computes lambda as docFreq+1 / numberOfDocuments+1.

Note

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

Inheritance

object

Lambda

LambdaDF

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Namespace: Lucene.Net.Search.Similarities

Assembly: Lucene.Net.dll

Syntax

public class LambdaDF : Lambda

Constructors

LambdaDF()

Sole constructor: parameter-free

Declaration

public LambdaDF()

Methods

CalculateLambda(BasicStats)

Computes the lambda parameter.

Declaration

public override sealed float CalculateLambda(BasicStats stats)

Parameters

Type	Name	Description
BasicStats	stats

Returns

Type	Description
float

Overrides

Lambda.CalculateLambda(BasicStats)

Explain(BasicStats)

Explains the lambda parameter.

Declaration

public override sealed Explanation Explain(BasicStats stats)

Parameters

Type	Name	Description
BasicStats	stats

Returns

Type	Description
Explanation

Overrides

Lambda.Explain(BasicStats)

ToString()

Subclasses must override this method to return the code of the lambda formula. Since the original paper is not very clear on this matter, and also uses the DFR naming scheme incorrectly, the codes here were chosen arbitrarily.

Declaration

public override string ToString()

Returns

Type	Description
string

Overrides

Lambda.ToString()