org.grouplens.lenskit.knn.item

Class SimilaritySumNeighborhoodScorer

java.lang.Object

org.grouplens.lenskit.knn.item.SimilaritySumNeighborhoodScorer

All Implemented Interfaces:

Serializable, NeighborhoodScorer

@Shareable
public class SimilaritySumNeighborhoodScorer
extends Object
implements NeighborhoodScorer, Serializable

Neighborhood scorer that computes the sum of neighborhood similarities.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SimilaritySumNeighborhoodScorer()

Method Summary

Modifier and Type	Method and Description
ScoredId	score(long item, SparseVector neighbors, SparseVector scores) Compute a score based on similar neighbors and their corresponding scores.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SimilaritySumNeighborhoodScorer

public SimilaritySumNeighborhoodScorer()

Method Detail

score

public ScoredId score(long item,
                      SparseVector neighbors,
                      SparseVector scores)

Description copied from interface: NeighborhoodScorer

Compute a score based on similar neighbors and their corresponding scores.

Specified by:

score in interface NeighborhoodScorer

neighbors - A vector of neighbors with similarity measures.

scores - A vector of item scores. It should contain a score for every item in neighbors.

Returns:

An accumulated score from the neighbors, or null if no score could be computed.

toString

public String toString()

Overrides:

toString in class Object