org.grouplens.lenskit.knn.item

Interface ItemScoreAlgorithm

All Known Implementing Classes:

DefaultItemScoreAlgorithm

@DefaultImplementation(value=DefaultItemScoreAlgorithm.class)
public interface ItemScoreAlgorithm

Algorithm for scoring items given an item-item model and neighborhood scorer. Used by ItemItemScorer and ItemItemGlobalScorer to score items. This logic is mainly abstracted so that the personalized and global item scorers can share logic; it isn't very common to reimplement this component.

Since:

0.10

Method Summary

Modifier and Type	Method and Description
void	scoreItems(ItemItemModel model, SparseVector userData, MutableSparseVector scores, NeighborhoodScorer scorer) Score items for a user.

Method Detail

scoreItems

void scoreItems(ItemItemModel model,
                SparseVector userData,
                MutableSparseVector scores,
                NeighborhoodScorer scorer)

Score items for a user.

Parameters:

model - The item-item model.

userData - The user's rating data.

scores - The score vector (key domain is items to score). Unscoreable items will be left unchanged.

scorer - The scorer to use.