Package es.upm.etsisi.cf4j.qualityMeasure.prediction

Class Coverage

java.lang.Object

es.upm.etsisi.cf4j.qualityMeasure.QualityMeasure

es.upm.etsisi.cf4j.qualityMeasure.prediction.Coverage

public class Coverage
extends QualityMeasure

This class calculates the Coverage of the recommender system. The coverage is the capacity of the recommender system to recommend new items. It is calculates as follows:

coverage = <number of test items predicted> / <number of test items>

Field Summary

Fields inherited from class es.upm.etsisi.cf4j.qualityMeasure.QualityMeasure

recommender

Constructor Summary

Constructors

Constructor	Description
Coverage(Recommender recommender)	Constructor of the class which basically calls the father's one.

Method Summary

Modifier and Type	Method	Description
double	getScore(TestUser testUser, double[] predictions)	Computes the quality measure score for a TestUser given the predictions for his/her test ratings

Methods inherited from class es.upm.etsisi.cf4j.qualityMeasure.QualityMeasure

getScore, getScore

Methods inherited from class java.lang.Object

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

Constructor Detail

Coverage

public Coverage(Recommender recommender)

Constructor of the class which basically calls the father's one.

Parameters:

recommender - Recommender instance for which the coverage are going to be computed.

Method Detail

getScore

public double getScore(TestUser testUser,
                       double[] predictions)

Description copied from class: QualityMeasure

Computes the quality measure score for a TestUser given the predictions for his/her test ratings

Specified by:

getScore in class QualityMeasure

Parameters:

testUser - TestUser for which the quality measure score is computed

predictions - Prediction value for the test items rated by the test user

Returns:

Quality measure score