org.ranksys.fm.data

Class OneClassPreferenceFMData

java.lang.Object

org.ranksys.fm.data.OneClassPreferenceFMData

All Implemented Interfaces:

org.ranksys.javafm.data.FMData

public class OneClassPreferenceFMData
extends Object
implements org.ranksys.javafm.data.FMData

Samples user preferences with a number of negative preferences for one class prediction for collaborative filtering.

Author:

Saúl Vargas (Saul@VargasSandoval.es)

Constructor Summary

Constructors

Constructor and Description
OneClassPreferenceFMData(FastPreferenceData<?,?> prefs, double negativeProp) Constructor.
OneClassPreferenceFMData(FastPreferenceData<?,?> prefs, double negativeProp, Random rnd) Constructor.

Method Summary

Modifier and Type	Method and Description
int	numFeatures()
int	numInstances()
void	shuffle()
Stream<? extends org.ranksys.javafm.FMInstance>	stream()

Methods inherited from class java.lang.Object

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

Constructor Detail

OneClassPreferenceFMData

public OneClassPreferenceFMData(FastPreferenceData<?,?> prefs,
                                double negativeProp)

Constructor.

Parameters:

prefs - preference data

negativeProp - proportion of negative instances wrt positive preferences by user

OneClassPreferenceFMData

public OneClassPreferenceFMData(FastPreferenceData<?,?> prefs,
                                double negativeProp,
                                Random rnd)

Constructor.

Parameters:

prefs - preference data

negativeProp - proportion of negative instances wrt positive preferences by user

rnd - random number generator

Method Detail

numFeatures

public int numFeatures()

Specified by:

numFeatures in interface org.ranksys.javafm.data.FMData

numInstances

public int numInstances()

Specified by:

numInstances in interface org.ranksys.javafm.data.FMData

shuffle

public void shuffle()

Specified by:

shuffle in interface org.ranksys.javafm.data.FMData

stream

public Stream<? extends org.ranksys.javafm.FMInstance> stream()

Specified by:

stream in interface org.ranksys.javafm.data.FMData