indri::query::TFIDFTermScoreFunction Class Reference

#include <TFIDFTermScoreFunction.hpp>

Inheritance diagram for indri::query::TFIDFTermScoreFunction:

List of all members.


Public Member Functions
	TFIDFTermScoreFunction (double idf, double averageDocumentLength, int qTF=1, double k1=1.2, double b=0.75, bool okapi=false, double k3=7)
	TFIDFTermScoreFunction (double idf, double averageDocumentLength, double qtw=1.0, double k1=1.2, double b=0.75, bool okapi=false, double k3=7)
double	scoreOccurrence (double occurrences, int documentLength)
double	scoreOccurrence (double occurrences, int contextSize, double documentOccurrences, int documentLength)
double	maximumScore (int minimumDocumentLength, int maximumOccurrences)
double	queryTermWeight (double queryK1, double queryB, double _qTF)
Private Member Functions
void	_precomputeConstants ()
Private Attributes
double	_inverseDocumentFrequency
	inverse document frequency (IDF) for this term
double	_averageDocumentLength
	average document length in the collection
double	_termWeight
double	_k1
double	_b
double	_k3
double	_bOverAvgDocLength
double	_k1TimesOneMinusB
double	_idfTimesK1PlusOne
double	_k1TimesBOverAvgDocLength
double	_termWeightTimesIDFTimesK1
double	_termWeightTimesidfTimesK1PlusOne
bool	_okapi

Constructor & Destructor Documentation

indri::query::TFIDFTermScoreFunction::TFIDFTermScoreFunction ( double idf,

double averageDocumentLength,

int qTF = 1,

double k1 = 1.2,

double b = 0.75,

bool okapi = false,

double k3 = 7

) [inline]

indri::query::TFIDFTermScoreFunction::TFIDFTermScoreFunction ( double idf,

double averageDocumentLength,

double qtw = 1.0,

double k1 = 1.2,

double b = 0.75,

bool okapi = false,

double k3 = 7

) [inline]

Member Function Documentation

void indri::query::TFIDFTermScoreFunction::_precomputeConstants ( ) [inline, private]

double indri::query::TFIDFTermScoreFunction::maximumScore ( int minimumDocumentLength,

int maximumOccurrences

) [inline]

double indri::query::TFIDFTermScoreFunction::queryTermWeight ( double queryK1,

double queryB,

double _qTF

) [inline]

double indri::query::TFIDFTermScoreFunction::scoreOccurrence ( double occurrences,

int contextSize,

double documentOccurrences,

int documentLength

) [inline, virtual]

Implements indri::query::TermScoreFunction.

double indri::query::TFIDFTermScoreFunction::scoreOccurrence ( double occurrences,

int documentLength

) [inline, virtual]

Implements indri::query::TermScoreFunction.