C# 클래스 MyMediaLite.RatingPrediction.ItemKNN

Weighted item-based kNN

상속: KNN, IItemSimilarityProvider, IFoldInRatingPredictor

보호된 프로퍼티들

프로퍼티	타입	설명
GetPositivelyCorrelatedEntities	IList>.Func
data_item	MyMediaLite.DataType.SparseBooleanMatrix

공개 메소드들

메소드	설명
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

보호된 메소드들

메소드	설명
AddItem ( int item_id ) : void

메소드 상세

AddItem() 보호된 메소드

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

AddRating() 공개 메소드

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

ItemKNN() 공개 메소드

public ItemKNN ( ) : System
리턴	System

LoadModel() 공개 메소드

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

Predict() 공개 메소드

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
리턴	double

RemoveRating() 공개 메소드

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

UpdateRating() 공개 메소드

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

프로퍼티 상세

GetPositivelyCorrelatedEntities 보호되어 있는 프로퍼티

Get positively correlated entities

protected Func> GetPositivelyCorrelatedEntities
리턴	IList>.Func

data_item 보호되어 있는 프로퍼티

Matrix indicating which item was rated by which user

protected SparseBooleanMatrix,MyMediaLite.DataType data_item
리턴	MyMediaLite.DataType.SparseBooleanMatrix