org.ranksys.rec.fast

Class FastEnsembleRecommender<U,I>

java.lang.Object

es.uam.eps.ir.ranksys.rec.AbstractRecommender<U,I>

es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender<U,I>

es.uam.eps.ir.ranksys.rec.fast.FastRankingRecommender<U,I>

org.ranksys.rec.fast.FastEnsembleRecommender<U,I>

Type Parameters:

U - user type

I - item type

All Implemented Interfaces:

ItemIndex<I>, UserIndex<U>, FastItemIndex<I>, FastUserIndex<U>, FastRecommender<U,I>, Recommender<U,I>

public class FastEnsembleRecommender<U,I>
extends FastRankingRecommender<U,I>

Ensemble of recommenders, performs a linear combination of the scores given by several recommenders. TO DO: add normalization of scores prior to aggregation.

Author:

Saúl Vargas (Saul.Vargas@glasgow.ac.uk)

Field Summary

Fields inherited from class es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender

iIndex, uIndex

Constructor Summary

Constructors

Constructor and Description
FastEnsembleRecommender(Iterable<Map.Entry<FastRankingRecommender<U,I>,Double>> recommenders) Constructor.

Method Summary

Modifier and Type	Method and Description
it.unimi.dsi.fastutil.ints.Int2DoubleMap	getScoresMap(int uidx) Returns a map of item-score pairs.

Methods inherited from class es.uam.eps.ir.ranksys.rec.fast.FastRankingRecommender

getRecommendation

Methods inherited from class es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender

getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, iidx2item, item2iidx, numItems, numUsers, uidx2user, user2uidx

Methods inherited from class es.uam.eps.ir.ranksys.rec.AbstractRecommender

getRecommendation, getRecommendation

Methods inherited from class java.lang.Object

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

Methods inherited from interface es.uam.eps.ir.ranksys.rec.Recommender

getRecommendation, getRecommendation

Methods inherited from interface es.uam.eps.ir.ranksys.fast.index.FastUserIndex

containsUser, getAllUidx, getAllUsers, uidx2user, uidx2user, user2uidx, user2uidx

Methods inherited from interface es.uam.eps.ir.ranksys.fast.index.FastItemIndex

containsItem, getAllIidx, getAllItems, iidx2item, iidx2item, item2iidx, item2iidx

Constructor Detail

FastEnsembleRecommender

public FastEnsembleRecommender(Iterable<Map.Entry<FastRankingRecommender<U,I>,Double>> recommenders)

Constructor.

Parameters:

recommenders - a sequence of recommender-weight pairs

Method Detail

getScoresMap

public it.unimi.dsi.fastutil.ints.Int2DoubleMap getScoresMap(int uidx)

Returns a map of item-score pairs.

Specified by:

getScoresMap in class FastRankingRecommender<U,I>

Parameters:

uidx - index of the user whose scores are predicted

Returns:

a map of item-score pairs