org.lenskit.knn.user

Class SimilaritySumUserNeighborhoodScorer

java.lang.Object

org.lenskit.knn.user.SimilaritySumUserNeighborhoodScorer

All Implemented Interfaces:

java.io.Serializable, UserNeighborhoodScorer

@Immutable
 @Shareable
public class SimilaritySumUserNeighborhoodScorer
extends java.lang.Object
implements UserNeighborhoodScorer, java.io.Serializable

Score an item using the weighted average of neighbor ratings.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SimilaritySumUserNeighborhoodScorer(int min) Construct a weighted average scorer.

Method Summary

Modifier and Type	Method and Description
UserUserResult	score(long item, java.util.List<Neighbor> neighbors) Compute the score for an item given a list of neighbors.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimilaritySumUserNeighborhoodScorer

@Inject
public SimilaritySumUserNeighborhoodScorer(@MinNeighbors
                                                   int min)

Construct a weighted average scorer.

Parameters:

min - The minimum neighbors.

Method Detail

score

@Nullable
public UserUserResult score(long item,
                                      java.util.List<Neighbor> neighbors)

Description copied from interface: UserNeighborhoodScorer

Compute the score for an item given a list of neighbors.

Specified by:

score in interface UserNeighborhoodScorer

Parameters:

item - The item to score.

neighbors - The list of neighbors.

Returns:

The result, or null.