org.apache.mahout.cf.taste.example.kddcup.track1

Class Track1RecommenderEvaluator

java.lang.Object

org.apache.mahout.cf.taste.impl.eval.AbstractDifferenceRecommenderEvaluator

org.apache.mahout.cf.taste.example.kddcup.track1.Track1RecommenderEvaluator

All Implemented Interfaces:

RecommenderEvaluator

public final class Track1RecommenderEvaluator
extends AbstractDifferenceRecommenderEvaluator

Attempts to run an evaluation just like that dictated for Yahoo's KDD Cup, Track 1. It will compute the RMSE of a validation data set against the predicted ratings from the training data set.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.mahout.cf.taste.impl.eval.AbstractDifferenceRecommenderEvaluator

AbstractDifferenceRecommenderEvaluator.PreferenceEstimateCallable

Constructor Summary

Constructors

Constructor and Description
Track1RecommenderEvaluator(File dataFileDirectory)

Method Summary

Methods

Modifier and Type	Method and Description
protected double	computeFinalEvaluation()
double	evaluate(RecommenderBuilder recommenderBuilder, DataModelBuilder dataModelBuilder, DataModel dataModel, double trainingPercentage, double evaluationPercentage)
protected void	processOneEstimate(float estimatedPreference, Preference realPref)
protected void	reset()

Methods inherited from class org.apache.mahout.cf.taste.impl.eval.AbstractDifferenceRecommenderEvaluator

execute, getMaxPreference, getMinPreference, setMaxPreference, setMinPreference

Methods inherited from class java.lang.Object

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

Constructor Detail

Track1RecommenderEvaluator

public Track1RecommenderEvaluator(File dataFileDirectory)

Method Detail

evaluate

public double evaluate(RecommenderBuilder recommenderBuilder,
              DataModelBuilder dataModelBuilder,
              DataModel dataModel,
              double trainingPercentage,
              double evaluationPercentage)
                throws TasteException

Specified by:

evaluate in interface RecommenderEvaluator

Overrides:

evaluate in class AbstractDifferenceRecommenderEvaluator

Throws:

TasteException

reset

protected void reset()

Specified by:

reset in class AbstractDifferenceRecommenderEvaluator

processOneEstimate

protected void processOneEstimate(float estimatedPreference,
                      Preference realPref)

Specified by:

processOneEstimate in class AbstractDifferenceRecommenderEvaluator

computeFinalEvaluation

protected double computeFinalEvaluation()

Specified by:

computeFinalEvaluation in class AbstractDifferenceRecommenderEvaluator