IFoldInItemRecommender Interface Reference

Rating predictor that allows folding in new users. More...

Inheritance diagram for IFoldInItemRecommender:
IRecommender

List of all members.

Public Member Functions

bool CanPredict (int user_id, int item_id)
 Check whether a useful prediction (i.e. not using a fallback/default answer) can be made for a given user-item combination.
void LoadModel (string filename)
 Get the model parameters from a file.
float Predict (int user_id, int item_id)
 Predict rating or score for a given user-item combination.
void SaveModel (string filename)
 Save the model parameters to a file.
IList< Pair< int, float > > ScoreItems (IList< int > accessed_items, IList< int > candidate_items)
 Score a list of items given a list of items that represent a new user.
string ToString ()
 Return a string representation of the recommender.
void Train ()
 Learn the model parameters of the recommender from the training data.

Detailed Description

Rating predictor that allows folding in new users.

The process of folding in is computing a predictive model for a new user based on their ratings and the existing recommender, without modifying the parameters of the existing recommender.

Literature:


Member Function Documentation

bool CanPredict ( int  user_id,
int  item_id 
) [inherited]

Check whether a useful prediction (i.e. not using a fallback/default answer) can be made for a given user-item combination.

It is up to the recommender implementor to decide when a prediction is useful, and to document it accordingly.

Parameters:
user_id the user ID
item_id the item ID
Returns:
true if a useful prediction can be made, false otherwise

Implemented in Ensemble, ItemRecommender, BiPolarSlopeOne, Constant, GlobalAverage, ItemAverage, Random, RatingPredictor, SlopeOne, and UserAverage.

void LoadModel ( string  filename  )  [inherited]
float Predict ( int  user_id,
int  item_id 
) [inherited]
void SaveModel ( string  filename  )  [inherited]
IList<Pair<int, float> > ScoreItems ( IList< int >  accessed_items,
IList< int >  candidate_items 
)

Score a list of items given a list of items that represent a new user.

Returns:
a list of int and float pairs, representing item IDs and predicted scores
Parameters:
accessed_items the ratings (item IDs and rating values) representing the new user
candidate_items the items to be rated
string ToString (  )  [inherited]

The documentation for this interface was generated from the following file:
Generated on Thu Apr 5 01:11:33 2012 for MyMediaLite by  doxygen 1.6.3