cc.mallet.optimize
Class BackTrackLineSearch

java.lang.Object
  cc.mallet.optimize.BackTrackLineSearch

All Implemented Interfaces:

LineOptimizer.ByGradient

public class BackTrackLineSearch
extends java.lang.Object
implements LineOptimizer.ByGradient

Constructor Summary

BackTrackLineSearch(Optimizable.ByGradientValue optimizable)

Method Summary

double	optimize(double[] line, double initialStep) Returns the last step size used.
void	setAbsTolx(double tolx) Sets the tolerance of absolute diff in function value.
void	setRelTolx(double tolx) Sets the tolerance of relative diff in function value.

Methods inherited from class java.lang.Object

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

Constructor Detail

BackTrackLineSearch

public BackTrackLineSearch(Optimizable.ByGradientValue optimizable)

Method Detail

setRelTolx

public void setRelTolx(double tolx)

Sets the tolerance of relative diff in function value. Line search converges if abs(delta x / x) < tolx for all coordinates.

setAbsTolx

public void setAbsTolx(double tolx)

Sets the tolerance of absolute diff in function value. Line search converges if abs(delta x) < tolx for all coordinates.

optimize

public double optimize(double[] line,
                       double initialStep)

Description copied from interface: LineOptimizer.ByGradient

Returns the last step size used.

Specified by:

optimize in interface LineOptimizer.ByGradient