C# Class Lucene.Net.Search.DefaultSimilarity

Inheritance: Similarity

Show file Open project: synhershko/lucene.net Class Usage Examples

Protected Properties

Property	Type	Description
internalDiscountOverlaps	bool

Public Methods

Method	Description
ComputeNorm ( System field, Lucene.Net.Index.FieldInvertState state ) : float	Implemented as `state.getBoost()lengthNorm(numTerms)`, where `numTerms` is FieldInvertState.GetLength() if SetDiscountOverlaps is false, else it's FieldInvertState.GetLength() - FieldInvertState.GetNumOverlap() . WARNING*: This API is new and experimental, and may suddenly change.
Coord ( int overlap, int maxOverlap ) : float	Implemented as `overlap / maxOverlap`.
Idf ( int docFreq, int numDocs ) : float	Implemented as `log(numDocs/(docFreq+1)) + 1`.
LengthNorm ( System fieldName, int numTerms ) : float	Implemented as `1/sqrt(numTerms)`.
QueryNorm ( float sumOfSquaredWeights ) : float	Implemented as `1/sqrt(sumOfSquaredWeights)`.
SloppyFreq ( int distance ) : float	Implemented as `1 / (distance + 1)`.
Tf ( float freq ) : float	Implemented as `sqrt(freq)`.

Method Details

ComputeNorm() public method

Implemented as state.getBoost()*lengthNorm(numTerms), where numTerms is FieldInvertState.GetLength() if SetDiscountOverlaps is false, else it's FieldInvertState.GetLength() - FieldInvertState.GetNumOverlap() .

WARNING: This API is new and experimental, and may suddenly change.

public ComputeNorm ( System field, Lucene.Net.Index.FieldInvertState state ) : float
field	System
state	Lucene.Net.Index.FieldInvertState
return	float

Coord() public method

Implemented as overlap / maxOverlap.

public Coord ( int overlap, int maxOverlap ) : float
overlap	int
maxOverlap	int
return	float

Idf() public method

Implemented as log(numDocs/(docFreq+1)) + 1.

public Idf ( int docFreq, int numDocs ) : float
docFreq	int
numDocs	int
return	float

LengthNorm() public method

Implemented as 1/sqrt(numTerms).

public LengthNorm ( System fieldName, int numTerms ) : float
fieldName	System
numTerms	int
return	float

QueryNorm() public method

Implemented as 1/sqrt(sumOfSquaredWeights).

public QueryNorm ( float sumOfSquaredWeights ) : float
sumOfSquaredWeights	float
return	float

SloppyFreq() public method

Implemented as 1 / (distance + 1).

public SloppyFreq ( int distance ) : float
distance	int
return	float

Tf() public method

Implemented as sqrt(freq).

public Tf ( float freq ) : float
freq	float
return	float

Property Details

internalDiscountOverlaps protected property

protected bool internalDiscountOverlaps
return	bool