org.grouplens.lenskit.transform.normalize

Class MeanVarianceNormalizer.Builder

java.lang.Object

org.grouplens.lenskit.transform.normalize.MeanVarianceNormalizer.Builder

All Implemented Interfaces:

javax.inject.Provider<MeanVarianceNormalizer>

Enclosing class:

MeanVarianceNormalizer

public static class MeanVarianceNormalizer.Builder
extends Object
implements javax.inject.Provider<MeanVarianceNormalizer>

A Builder for UserVarianceNormalizers that computes the variance from a RatingBuildContext.

Constructor Summary

Constructors

Constructor and Description
Builder(EventDAO dao, double d) Create a new mean-variance normalizer builder.

Method Summary

Modifier and Type	Method and Description
MeanVarianceNormalizer	get()

Methods inherited from class java.lang.Object

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

Constructor Detail

Builder

@Inject
public Builder(EventDAO dao,
                       @MeanDamping
                       double d)

Create a new mean-variance normalizer builder.

Parameters:

dao - The DAO from which to get the global mean.

d - A Bayesian damping term. The normalizer pretends each user has an additional d ratings that are equal to the global mean.

Method Detail

get

public MeanVarianceNormalizer get()

Specified by:

get in interface javax.inject.Provider<MeanVarianceNormalizer>