C# Class MyMediaLite.RatingPrediction.ItemKNN

Weighted item-based kNN

Inheritance: KNN, IItemSimilarityProvider, IFoldInRatingPredictor

Afficher le fichier Open project: zenogantner/MML-KDD

Protected Properties

Свойство	Type	Description
GetPositivelyCorrelatedEntities	IList>.Func
data_item	MyMediaLite.DataType.SparseBooleanMatrix

Méthodes publiques

Méthode	Description
AddRating ( int user_id, int item_id, double rating ) : void
ItemKNN ( ) : System
LoadModel ( string filename ) : void
Predict ( int user_id, int item_id ) : double	Predict the rating of a given user for a given item If the user or the item are not known to the recommender, a suitable average is returned. To avoid this behavior for unknown entities, use CanPredict() to check before.
RemoveRating ( int user_id, int item_id ) : void
UpdateRating ( int user_id, int item_id, double rating ) : void

Méthodes protégées

Méthode	Description
AddItem ( int item_id ) : void

Method Details

AddItem() protected méthode

protected AddItem ( int item_id ) : void
item_id	int
Résultat	void

AddRating() public méthode

public AddRating ( int user_id, int item_id, double rating ) : void
user_id	int
item_id	int
rating	double
Résultat	void

ItemKNN() public méthode

public ItemKNN ( ) : System
Résultat	System

LoadModel() public méthode

public LoadModel ( string filename ) : void
filename	string
Résultat	void

Predict() public méthode

Predict the rating of a given user for a given item

If the user or the item are not known to the recommender, a suitable average is returned. To avoid this behavior for unknown entities, use CanPredict() to check before.

public Predict ( int user_id, int item_id ) : double
user_id	int	the user ID
item_id	int	the item ID
Résultat	double

RemoveRating() public méthode

public RemoveRating ( int user_id, int item_id ) : void
user_id	int
item_id	int
Résultat	void

UpdateRating() public méthode

public UpdateRating ( int user_id, int item_id, double rating ) : void
user_id	int
item_id	int
rating	double
Résultat	void

Property Details

GetPositivelyCorrelatedEntities protected_oe property

Get positively correlated entities

protected Func> GetPositivelyCorrelatedEntities
Résultat	IList>.Func

data_item protected_oe property

Matrix indicating which item was rated by which user

protected SparseBooleanMatrix,MyMediaLite.DataType data_item
Résultat	MyMediaLite.DataType.SparseBooleanMatrix