de.jstacs.algorithms.optimization.termination
Class AbsoluteValueCondition

java.lang.Object
  de.jstacs.algorithms.optimization.termination.AbsoluteValueCondition

All Implemented Interfaces:

TerminationCondition

Deprecated. use of the absolute value condition is not recommended and it may be removed in future releases

public class AbsoluteValueCondition
extends Object
implements TerminationCondition

This class stops an optimization if the value of the function becomes less or equal to an absolute value, i.e., .

Author:

Jens Keilwagen

Constructor Summary

AbsoluteValueCondition(double threshold)
Deprecated. This constructor creates an instance that stops an minimization when the value of the function is below the given threshold
Be careful!

Method Summary

boolean

doNextIteration(int iteration, double f_last, double f_current, double[] gradient, double[] direction, double alpha, Time t) Deprecated. This method allows to decide whether to do another iteration in an optimization or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbsoluteValueCondition

public AbsoluteValueCondition(double threshold)

Deprecated.

This constructor creates an instance that stops an minimization when the value of the function is below the given threshold
Be careful! If you set the value too low the minimization will not terminate.

Parameters:

threshold - the threshold for stopping the optimization

Method Detail

doNextIteration

public boolean doNextIteration(int iteration,
                               double f_last,
                               double f_current,
                               double[] gradient,
                               double[] direction,
                               double alpha,
                               Time t)

Deprecated.

Description copied from interface: TerminationCondition

This method allows to decide whether to do another iteration in an optimization or not.

Specified by:

doNextIteration in interface TerminationCondition

Parameters:

iteration - the number of performed iterations

f_last - last value of the function

f_current - current value of the function

gradient - the gradient of the function

direction - the last direction of the optimization

alpha - the last step size

t - a time object measuring the time that has been elapsed in the optimization

Returns:

true if another iteration should be done