org.apache.spark.ml.recommendation

Class ALS.NNLSSolver

Object

org.apache.spark.ml.recommendation.ALS.NNLSSolver

All Implemented Interfaces:

java.io.Serializable, ALS.LeastSquaresNESolver

Enclosing class:

ALS

public static class ALS.NNLSSolver
extends Object
implements ALS.LeastSquaresNESolver

NNLS solver.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ALS.NNLSSolver()

Method Summary

Methods

Modifier and Type	Method and Description
float[]	solve(ALS.NormalEquation ne, double lambda) Solves a nonnegative least squares problem with L2 regularizatin:

Methods inherited from class Object

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

Constructor Detail

ALS.NNLSSolver

public ALS.NNLSSolver()

Method Detail

solve

public float[] solve(ALS.NormalEquation ne,
            double lambda)

Solves a nonnegative least squares problem with L2 regularizatin:

min_x_ norm(A x - b)^2^ + lambda * n * norm(x)^2^ subject to x >= 0

Specified by:

solve in interface ALS.LeastSquaresNESolver