uk.ac.gla.terrier.matching.models.basicmodel
Class IF

java.lang.Object
  uk.ac.gla.terrier.matching.models.basicmodel.BasicModel
      uk.ac.gla.terrier.matching.models.basicmodel.IF

All Implemented Interfaces:

java.io.Serializable

public class IF
extends BasicModel

This class implements the IF basic model for randomness.

Version:

$Revision: 1.11 $

Author:

Ben He

See Also:

Serialized Form

Constructor Summary

IF()
A default constructor.

Method Summary

java.lang.String	getInfo() Returns the name of the model.
double	score(double tf, double documentFrequency, double termFrequency, double keyFrequency, double documentLength) This method computes the score for the implemented weighting model.

Methods inherited from class uk.ac.gla.terrier.matching.models.basicmodel.BasicModel

setNumberOfDocuments, setNumberOfTokens, stirlingPower

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IF

public IF()

A default constructor.

Method Detail

getInfo

public java.lang.String getInfo()

Returns the name of the model.

Specified by:

getInfo in class BasicModel

Returns:

the name of the model

score

public double score(double tf,
                    double documentFrequency,
                    double termFrequency,
                    double keyFrequency,
                    double documentLength)

This method computes the score for the implemented weighting model.

Specified by:

score in class BasicModel

Parameters:

tf - The term frequency in the document

documentFrequency - The document frequency of the term

termFrequency - the term frequency in the collection

keyFrequency - The normalised query term frequency.

documentLength - The length of the document.

Returns:

the score returned by the implemented weighting model.