opennlp.tools.ml.maxent.quasinewton

Class ParallelNegLogLikelihood

java.lang.Object

opennlp.tools.ml.maxent.quasinewton.NegLogLikelihood

opennlp.tools.ml.maxent.quasinewton.ParallelNegLogLikelihood

All Implemented Interfaces:

Function

public class ParallelNegLogLikelihood
extends NegLogLikelihood

Evaluate negative log-likelihood and its gradient in parallel

Constructor Summary

Constructors

Constructor and Description
ParallelNegLogLikelihood(DataIndexer indexer, int threads)

Method Summary

Modifier and Type	Method and Description
double[]	gradientAt(double[] x) Compute gradient
double	valueAt(double[] x) Negative log-likelihood

Methods inherited from class opennlp.tools.ml.maxent.quasinewton.NegLogLikelihood

getDimension, getInitialPoint

Methods inherited from class java.lang.Object

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

Constructor Detail

ParallelNegLogLikelihood

public ParallelNegLogLikelihood(DataIndexer indexer,
                                int threads)

Method Detail

valueAt

public double valueAt(double[] x)

Negative log-likelihood

Specified by:

valueAt in interface Function

Overrides:

valueAt in class NegLogLikelihood

gradientAt

public double[] gradientAt(double[] x)

Compute gradient

Specified by:

gradientAt in interface Function

Overrides:

gradientAt in class NegLogLikelihood