Package org.lenskit.data.ratings

Ratings data type.

See: Description

Interface Summary

Interface	Description
Preference	A real-valued preference a user has for an item.
RatingMatrix	Snapshot of the ratings data for building a recommender.
RatingVectorPDAO	Proxy DAO for user ‘rating vectors’, which are mappings of items to user preference.

Class Summary

Class	Description
EntityCountRatingVectorPDAO	Rating vector DAO that counts entities appearing for a user.
PackedRatingMatrix	An in-memory snapshot of rating data stored in packed arrays.
PackedRatingMatrixProvider	Build a packed rating matrix from the available rating events.
PreferenceDomain	An object describing the domain of preference data, used in ratings and predictions.
PreferenceDomainBuilder	Build a PreferenceDomain.
Rating	A user rating an item.
RatingBuilder	Build a Rating.
RatingMatrixEntry	An entry in a RatingMatrix.
Ratings	Utilities for working with ratings.
RatingSummary	A summary of the ratings data.
RatingSummaryProvider	Default builder for rating summaries.
StandardRatingVectorPDAO	Rating vector source that extracts user ratings from the database.

Annotation Types Summary

Annotation Type	Description
EntityCountRatingVectorPDAO.CountedType	Qualifier for the type of entities that are counted to compute user preferences.

Package org.lenskit.data.ratings Description

Ratings data type.

This package contains LensKit’s core Rating event type, as well as additional classes for working with rating data (and pseudo-ratings derived from other user activity).