cc.mallet.optimize
Class GradientAscent

java.lang.Object
  cc.mallet.optimize.GradientAscent

All Implemented Interfaces:

Optimizer

public class GradientAscent
extends java.lang.Object
implements Optimizer

Nested Class Summary

Nested classes/interfaces inherited from interface cc.mallet.optimize.Optimizer

Optimizer.ByBatches

Constructor Summary

GradientAscent(Optimizable.ByGradientValue function)

Method Summary

double	getInitialStepSize()
LineOptimizer.ByGradient	getLineMaximizer()
Optimizable	getOptimizable()
double	getStpmax()
boolean	isConverged()
boolean	optimize()
boolean	optimize(int numIterations)
void	setEvaluator(OptimizerEvaluator.ByGradient eval)
void	setInitialStepSize(double initialStepSize)
void	setMaxStepSize(double v)
void	setStpmax(double stpmax)
void	setTolerance(double tolerance) Sets the tolerance in the convergence test: 2.0*|value-old_value| <= tolerance*(|value|+|old_value|+eps) Default value is 0.001.

Methods inherited from class java.lang.Object

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

Constructor Detail

GradientAscent

public GradientAscent(Optimizable.ByGradientValue function)

Method Detail

getOptimizable

public Optimizable getOptimizable()

Specified by:

getOptimizable in interface Optimizer

isConverged

public boolean isConverged()

Specified by:

isConverged in interface Optimizer

getLineMaximizer

public LineOptimizer.ByGradient getLineMaximizer()

setTolerance

public void setTolerance(double tolerance)

Sets the tolerance in the convergence test: 2.0*|value-old_value| <= tolerance*(|value|+|old_value|+eps) Default value is 0.001.

Parameters:

tolerance - tolerance for convergence test

getInitialStepSize

public double getInitialStepSize()

setInitialStepSize

public void setInitialStepSize(double initialStepSize)

getStpmax

public double getStpmax()

setStpmax

public void setStpmax(double stpmax)

optimize

public boolean optimize()

Specified by:

optimize in interface Optimizer

optimize

public boolean optimize(int numIterations)

Specified by:

optimize in interface Optimizer

setMaxStepSize

public void setMaxStepSize(double v)

setEvaluator

public void setEvaluator(OptimizerEvaluator.ByGradient eval)