org.apache.mahout.math.als

Class ImplicitFeedbackAlternatingLeastSquaresSolver

java.lang.Object

org.apache.mahout.math.als.ImplicitFeedbackAlternatingLeastSquaresSolver

public class ImplicitFeedbackAlternatingLeastSquaresSolver
extends Object

see Collaborative Filtering for Implicit Feedback Datasets

Constructor Summary

Constructors

Constructor and Description
ImplicitFeedbackAlternatingLeastSquaresSolver(int numFeatures, double lambda, double alpha, OpenIntObjectHashMap<Vector> Y, int numTrainingThreads)

Method Summary

Modifier and Type	Method and Description
Matrix	getYtransposeY(OpenIntObjectHashMap<Vector> Y)
Vector	solve(Vector ratings)

Methods inherited from class java.lang.Object

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

Constructor Detail

ImplicitFeedbackAlternatingLeastSquaresSolver

public ImplicitFeedbackAlternatingLeastSquaresSolver(int numFeatures,
                                                     double lambda,
                                                     double alpha,
                                                     OpenIntObjectHashMap<Vector> Y,
                                                     int numTrainingThreads)

Method Detail

solve

public Vector solve(Vector ratings)

getYtransposeY

public Matrix getYtransposeY(OpenIntObjectHashMap<Vector> Y)