org.lenskit.slopeone

Class SlopeOneModel

java.lang.Object

org.lenskit.slopeone.SlopeOneModel

All Implemented Interfaces:

Serializable

@DefaultProvider(value=SlopeOneModelProvider.class)
 @Shareable
public class SlopeOneModel
extends Object
implements Serializable

A model for a SlopeOneItemScorer or WeightedSlopeOneItemScorer. Stores calculated deviation values and number of co-rating users for each item pair.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static org.grouplens.lenskit.symbols.Symbol	CORATINGS_SYMBOL

Constructor Summary

Constructors

Constructor and Description
SlopeOneModel(Long2ObjectMap<org.grouplens.lenskit.vectors.ImmutableSparseVector> matrix)

Method Summary

Modifier and Type	Method and Description
int	getCoratings(long item1, long item2)
double	getDeviation(long item1, long item2)

Methods inherited from class java.lang.Object

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

Field Detail

CORATINGS_SYMBOL

public static final org.grouplens.lenskit.symbols.Symbol CORATINGS_SYMBOL

Constructor Detail

SlopeOneModel

public SlopeOneModel(Long2ObjectMap<org.grouplens.lenskit.vectors.ImmutableSparseVector> matrix)

Method Detail

getDeviation

public double getDeviation(long item1,
                           long item2)

getCoratings

public int getCoratings(long item1,
                        long item2)