Uses of Interface
org.apache.mahout.cf.taste.model.PreferenceArray

Packages that use PreferenceArray

Package	Description
org.apache.mahout.cf.taste.eval
org.apache.mahout.cf.taste.impl.eval
org.apache.mahout.cf.taste.impl.model
org.apache.mahout.cf.taste.impl.model.file
org.apache.mahout.cf.taste.impl.recommender
org.apache.mahout.cf.taste.impl.recommender.svd
org.apache.mahout.cf.taste.model
org.apache.mahout.cf.taste.recommender

Uses of PreferenceArray in org.apache.mahout.cf.taste.eval

Method parameters in org.apache.mahout.cf.taste.eval with type arguments of type PreferenceArray

Modifier and Type	Method and Description
DataModel	DataModelBuilder.buildDataModel(FastByIDMap<PreferenceArray> trainingData) Builds a DataModel implementation to be used in an evaluation, given training data.
void	RelevantItemsDataSplitter.processOtherUser(long userID, FastIDSet relevantItemIDs, FastByIDMap<PreferenceArray> trainingUsers, long otherUserID, DataModel dataModel) Adds a single user and all their preferences to the training model.

Uses of PreferenceArray in org.apache.mahout.cf.taste.impl.eval

Method parameters in org.apache.mahout.cf.taste.impl.eval with type arguments of type PreferenceArray

Modifier and Type	Method and Description
void	GenericRelevantItemsDataSplitter.processOtherUser(long userID, FastIDSet relevantItemIDs, FastByIDMap<PreferenceArray> trainingUsers, long otherUserID, DataModel dataModel)

Constructors in org.apache.mahout.cf.taste.impl.eval with parameters of type PreferenceArray

Constructor and Description
AbstractDifferenceRecommenderEvaluator.PreferenceEstimateCallable(Recommender recommender, long testUserID, PreferenceArray prefs, AtomicInteger noEstimateCounter)

Uses of PreferenceArray in org.apache.mahout.cf.taste.impl.model

Classes in org.apache.mahout.cf.taste.impl.model that implement PreferenceArray

Modifier and Type	Class and Description
class	BooleanItemPreferenceArray Like BooleanUserPreferenceArray but stores preferences for one item (all item IDs the same) rather than one user.
class	BooleanUserPreferenceArray Like GenericUserPreferenceArray but stores, conceptually, BooleanPreference objects which have no associated preference value.
class	GenericItemPreferenceArray Like GenericUserPreferenceArray but stores preferences for one item (all item IDs the same) rather than one user.
class	GenericUserPreferenceArray Like GenericItemPreferenceArray but stores preferences for one user (all user IDs the same) rather than one item.

Methods in org.apache.mahout.cf.taste.impl.model that return PreferenceArray

Modifier and Type	Method and Description
PreferenceArray	PlusAnonymousUserDataModel.getPreferencesForItem(long itemID)
PreferenceArray	PlusAnonymousConcurrentUserDataModel.getPreferencesForItem(long itemID)
PreferenceArray	GenericDataModel.getPreferencesForItem(long itemID)
PreferenceArray	GenericBooleanPrefDataModel.getPreferencesForItem(long itemID)
PreferenceArray	PlusAnonymousUserDataModel.getPreferencesFromUser(long userID)
PreferenceArray	PlusAnonymousConcurrentUserDataModel.getPreferencesFromUser(long userID)
PreferenceArray	GenericDataModel.getPreferencesFromUser(long userID)
PreferenceArray	GenericBooleanPrefDataModel.getPreferencesFromUser(long userID)

Methods in org.apache.mahout.cf.taste.impl.model that return types with arguments of type PreferenceArray

Modifier and Type	Method and Description
FastByIDMap<PreferenceArray>	GenericDataModel.getRawItemData() This is used mostly internally to the framework, and shouldn't be relied upon otherwise.
FastByIDMap<PreferenceArray>	GenericDataModel.getRawUserData() This is used mostly internally to the framework, and shouldn't be relied upon otherwise.
static FastByIDMap<PreferenceArray>	GenericDataModel.toDataMap(DataModel dataModel) Exports the simple user IDs and preferences in the data model.
static FastByIDMap<PreferenceArray>	GenericDataModel.toDataMap(FastByIDMap<Collection<Preference>> data, boolean byUser) Swaps, in-place, Lists for arrays in Map values .

Methods in org.apache.mahout.cf.taste.impl.model with parameters of type PreferenceArray

Modifier and Type	Method and Description
void	PlusAnonymousUserDataModel.setTempPrefs(PreferenceArray prefs)
void	PlusAnonymousConcurrentUserDataModel.setTempPrefs(PreferenceArray prefs, long anonymousUserID) Sets temporary preferences for a given anonymous user.

Method parameters in org.apache.mahout.cf.taste.impl.model with type arguments of type PreferenceArray

Modifier and Type	Method and Description
static FastByIDMap<FastIDSet>	GenericBooleanPrefDataModel.toDataMap(FastByIDMap<PreferenceArray> data)

Constructor parameters in org.apache.mahout.cf.taste.impl.model with type arguments of type PreferenceArray

Constructor and Description
GenericDataModel(FastByIDMap<PreferenceArray> userData) Creates a new GenericDataModel from the given users (and their preferences).
GenericDataModel(FastByIDMap<PreferenceArray> userData, FastByIDMap<FastByIDMap<Long>> timestamps) Creates a new GenericDataModel from the given users (and their preferences).

Uses of PreferenceArray in org.apache.mahout.cf.taste.impl.model.file

Methods in org.apache.mahout.cf.taste.impl.model.file that return PreferenceArray

Modifier and Type	Method and Description
PreferenceArray	FileDataModel.getPreferencesForItem(long itemID)
PreferenceArray	FileDataModel.getPreferencesFromUser(long userID)

Uses of PreferenceArray in org.apache.mahout.cf.taste.impl.recommender

Methods in org.apache.mahout.cf.taste.impl.recommender with parameters of type PreferenceArray

Modifier and Type	Method and Description
protected float	GenericItemBasedRecommender.doEstimatePreference(long userID, PreferenceArray preferencesFromUser, long itemID)
protected float	GenericBooleanPrefItemBasedRecommender.doEstimatePreference(long userID, PreferenceArray preferencesFromUser, long itemID) This computation is in a technical sense, wrong, since in the domain of "boolean preference users" where all preference values are 1, this method should only ever return 1.0 or NaN.
protected FastIDSet	AbstractRecommender.getAllOtherItems(long userID, PreferenceArray preferencesFromUser, boolean includeKnownItems)
FastIDSet	AbstractCandidateItemsStrategy.getCandidateItems(long userID, PreferenceArray preferencesFromUser, DataModel dataModel, boolean includeKnownItems)

Uses of PreferenceArray in org.apache.mahout.cf.taste.impl.recommender.svd

Methods in org.apache.mahout.cf.taste.impl.recommender.svd with parameters of type PreferenceArray

Modifier and Type	Method and Description
protected static Vector	ALSWRFactorizer.ratingVector(PreferenceArray prefs)
protected Vector	ALSWRFactorizer.sparseItemRatingVector(PreferenceArray prefs)
protected Vector	ALSWRFactorizer.sparseUserRatingVector(PreferenceArray prefs)

Uses of PreferenceArray in org.apache.mahout.cf.taste.model

Methods in org.apache.mahout.cf.taste.model that return PreferenceArray

Modifier and Type	Method and Description
PreferenceArray	PreferenceArray.clone()
PreferenceArray	DataModel.getPreferencesForItem(long itemID)
PreferenceArray	DataModel.getPreferencesFromUser(long userID)

Methods in org.apache.mahout.cf.taste.model that return types with arguments of type PreferenceArray

Modifier and Type	Method and Description
FastByIDMap<PreferenceArray>	JDBCDataModel.exportWithPrefs() Hmm, should this exist elsewhere? seems like most relevant for a DB implementation, which is not in memory, which might want to export to memory.

Uses of PreferenceArray in org.apache.mahout.cf.taste.recommender

Methods in org.apache.mahout.cf.taste.recommender with parameters of type PreferenceArray

Modifier and Type	Method and Description
FastIDSet	CandidateItemsStrategy.getCandidateItems(long userID, PreferenceArray preferencesFromUser, DataModel dataModel, boolean includeKnownItems)