Examples of org.apache.mahout.cf.taste.impl.recommender.TreeClusteringRecommender$Estimator

Package org.apache.mahout.cf.taste.impl.recommender

Examples of org.apache.mahout.cf.taste.impl.recommender.TreeClusteringRecommender$Estimator

org.apache.mahout.cf.taste.impl.recommender.TreeClusteringRecommender
A {@link org.apache.mahout.cf.taste.recommender.Recommender} that clusters users, then determines theclusters' top recommendations. This implementation builds clusters by repeatedly merging clusters until only a certain number remain, meaning that each cluster is sort of a tree of other clusters.

This {@link org.apache.mahout.cf.taste.recommender.Recommender} therefore has a few properties to note:
- For all users in a cluster, recommendations will be the same
- {@link #estimatePreference(long,long)} may well return {@link Double#NaN}; it does so when asked to estimate preference for an item for which no preference is expressed in the users in the cluster.


  Recommender buildRecommender(DataModel model) throws TasteException {
    UserSimilarity similarity = new LogLikelihoodSimilarity(model);
    ClusterSimilarity clusterSimilarity =
        new FarthestNeighborClusterSimilarity(similarity);
    return new TreeClusteringRecommender(model, clusterSimilarity, 10);
  }

View Full Code Here

TOP

Related Classes of org.apache.mahout.cf.taste.impl.recommender.TreeClusteringRecommender$Estimator

mia.recommender.ch04.ClusterBasedRecommender

org.apache.mahout.cf.taste.impl.common.FastIDSet

org.apache.mahout.cf.taste.impl.common.FullRunningAverage

org.apache.mahout.cf.taste.impl.common.LongPrimitiveIterator

org.apache.mahout.cf.taste.impl.common.RefreshHelper

org.apache.mahout.cf.taste.impl.common.RunningAverage

org.apache.mahout.cf.taste.model.DataModel

org.apache.mahout.cf.taste.model.Item

org.apache.mahout.cf.taste.model.Preference

org.apache.mahout.cf.taste.model.User

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.