org.grouplens.lenskit.knn.item.model

Class NormalizingItemItemModelBuilder

java.lang.Object

org.grouplens.lenskit.knn.item.model.NormalizingItemItemModelBuilder

All Implemented Interfaces:

javax.inject.Provider<ItemItemModel>

public class NormalizingItemItemModelBuilder
extends 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
NormalizingItemItemModelBuilder(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()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

NormalizingItemItemModelBuilder

@Inject
public NormalizingItemItemModelBuilder(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 ItemItemModelBuilder.

iterStrat - The neighbor iteration strategy.

Method Detail

get

public SimilarityMatrixModel get()

Specified by:

get in interface javax.inject.Provider<ItemItemModel>

toString

public String toString()

Overrides:

toString in class Object