org.apache.mahout.cf.taste.recommender

Interface UserBasedRecommender

All Superinterfaces:

Recommender, Refreshable

All Known Implementing Classes:

GenericBooleanPrefUserBasedRecommender, GenericUserBasedRecommender

public interface UserBasedRecommender
extends Recommender

Interface implemented by "user-based" recommenders.

Method Summary

Modifier and Type	Method and Description
long[]	mostSimilarUserIDs(long userID, int howMany)
long[]	mostSimilarUserIDs(long userID, int howMany, Rescorer<LongPair> rescorer)

Methods inherited from interface org.apache.mahout.cf.taste.recommender.Recommender

estimatePreference, getDataModel, recommend, recommend, recommend, recommend, removePreference, setPreference

Methods inherited from interface org.apache.mahout.cf.taste.common.Refreshable

refresh

Method Detail

mostSimilarUserIDs

long[] mostSimilarUserIDs(long userID,
                          int howMany)
                   throws TasteException

Parameters:

userID - ID of user for which to find most similar other users

howMany - desired number of most similar users to find

Returns:

users most similar to the given user

Throws:

TasteException - if an error occurs while accessing the DataModel

mostSimilarUserIDs

long[] mostSimilarUserIDs(long userID,
                          int howMany,
                          Rescorer<LongPair> rescorer)
                   throws TasteException

Parameters:

userID - ID of user for which to find most similar other users

howMany - desired number of most similar users to find

rescorer - Rescorer which can adjust user-user similarity estimates used to determine most similar users

Returns:

IDs of users most similar to the given user

Throws:

TasteException - if an error occurs while accessing the DataModel