Class NormalizationH1

Normalization model that assumes a uniform distribution of the term frequency.

While this model is parameterless in the original article, information-based models (see IBSimilarity) introduced a multiplying factor. The default value for the c parameter is 1.

Note

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

Inheritance
object
Normalization
NormalizationH1
Inherited Members
Namespace: Lucene.Net.Search.Similarities
Assembly: Lucene.Net.dll
Syntax
public class NormalizationH1 : Normalization

Constructors

NormalizationH1()

Calls NormalizationH1(1)

Declaration
public NormalizationH1()

NormalizationH1(float)

Creates NormalizationH1 with the supplied parameter c.

Declaration
public NormalizationH1(float c)
Parameters
Type Name Description
float c

Hyper-parameter that controls the term frequency normalization with respect to the document length.

Properties

C

Returns the c parameter.

Declaration
public virtual float C { get; }
Property Value
Type Description
float
See Also

Methods

Tfn(BasicStats, float, float)

Returns the normalized term frequency.

Declaration
public override sealed float Tfn(BasicStats stats, float tf, float len)
Parameters
Type Name Description
BasicStats stats
float tf
float len

the field length.
Returns
Type Description
float
Overrides

ToString()

Subclasses must override this method to return the code of the normalization formula. Refer to the original paper for the list.

Declaration
public override string ToString()
Returns
Type Description
string
Overrides