org.deeplearning4j.optimize.solvers

Class ConjugateGradient

java.lang.Object

org.deeplearning4j.optimize.solvers.BaseOptimizer

org.deeplearning4j.optimize.solvers.ConjugateGradient

All Implemented Interfaces:

java.io.Serializable, ConvexOptimizer

public class ConjugateGradient
extends BaseOptimizer

Originally based on cc.mallet.optimize.ConjugateGradient Rewritten based on Conjugate Gradient algorithm in Bengio et al., Deep Learning (in preparation) Ch8. See also Nocedal & Wright, Numerical optimization, Ch5

See Also:

Serialized Form

Field Summary

Fields inherited from class org.deeplearning4j.optimize.solvers.BaseOptimizer

computationGraphUpdater, conf, GRADIENT_KEY, iterationListeners, lineMaximizer, log, model, oldScore, PARAMS_KEY, score, SCORE_KEY, SEARCH_DIR, searchState, step, stepFunction, stepMax, terminationConditions, updater

Constructor Summary

Constructors

Constructor and Description
ConjugateGradient(NeuralNetConfiguration conf, StepFunction stepFunction, java.util.Collection<IterationListener> iterationListeners, java.util.Collection<TerminationCondition> terminationConditions, Model model)
ConjugateGradient(NeuralNetConfiguration conf, StepFunction stepFunction, java.util.Collection<IterationListener> iterationListeners, Model model)

Method Summary

Modifier and Type	Method and Description
void	postStep(org.nd4j.linalg.api.ndarray.INDArray gradient) Post step to update searchDirection with new gradient and parameter information
void	preProcessLine() Pre preProcess to setup initial searchDirection approximation

Methods inherited from class org.deeplearning4j.optimize.solvers.BaseOptimizer

batchSize, checkTerminalConditions, getComputationGraphUpdater, getConf, getDefaultStepFunctionForOptimizer, getIterationCount, getUpdater, gradientAndScore, incrementIterationCount, optimize, postFirstStep, score, setBatchSize, setListeners, setUpdater, setUpdaterComputationGraph, setupSearchState, updateGradientAccordingToParams

Methods inherited from class java.lang.Object

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

Constructor Detail

ConjugateGradient

public ConjugateGradient(NeuralNetConfiguration conf,
                         StepFunction stepFunction,
                         java.util.Collection<IterationListener> iterationListeners,
                         Model model)

ConjugateGradient

public ConjugateGradient(NeuralNetConfiguration conf,
                         StepFunction stepFunction,
                         java.util.Collection<IterationListener> iterationListeners,
                         java.util.Collection<TerminationCondition> terminationConditions,
                         Model model)

Method Detail

preProcessLine

public void preProcessLine()

Description copied from class: BaseOptimizer

Pre preProcess to setup initial searchDirection approximation

Specified by:

preProcessLine in interface ConvexOptimizer

Overrides:

preProcessLine in class BaseOptimizer

postStep

public void postStep(org.nd4j.linalg.api.ndarray.INDArray gradient)

Description copied from class: BaseOptimizer

Post step to update searchDirection with new gradient and parameter information

Specified by:

postStep in interface ConvexOptimizer

Overrides:

postStep in class BaseOptimizer