org.lenskit.knn.item.model

Class NormalizingItemItemModelProvider

java.lang.Object

org.lenskit.knn.item.model.NormalizingItemItemModelProvider

All Implemented Interfaces:

javax.inject.Provider<ItemItemModel>

public class NormalizingItemItemModelProvider
extends java.lang.Object
implements javax.inject.Provider<ItemItemModel>

Build an item-item CF model from rating data. This builder is more advanced than the standard builder. It allows arbitrary vector truncation and normalization.

Constructor Summary

Constructors

Constructor and Description
NormalizingItemItemModelProvider(ItemSimilarity sim, ItemItemBuildContext context, ItemVectorNormalizer rowNorm, VectorTruncator trunc, NeighborIterationStrategy iterStrat) Construct a normalizing item-item model builder.

Method Summary

Modifier and Type	Method and Description
SimilarityMatrixModel	get()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

NormalizingItemItemModelProvider

@Inject
public NormalizingItemItemModelProvider(ItemSimilarity sim,
                                                ItemItemBuildContext context,
                                                ItemVectorNormalizer rowNorm,
                                                VectorTruncator trunc,
                                                NeighborIterationStrategy iterStrat)

Construct a normalizing item-item model builder.

Parameters:

sim - The item similarity function.

context - The item-item build context.

rowNorm - The normalizer for item neighborhood vectors.

trunc - The truncator for truncating neighborhood vectors. Bind this to the provider StandardVectorTruncatorProvider to get the same threshold and model size configuration behavior as ItemItemModelProvider.

iterStrat - The neighbor iteration strategy.

Method Detail

get

public SimilarityMatrixModel get()

Specified by:

get in interface javax.inject.Provider<ItemItemModel>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object