org.apache.commons.math3.optim
Class AbstractConvergenceChecker<PAIR>

java.lang.Object
  org.apache.commons.math3.optim.AbstractConvergenceChecker<PAIR>

Type Parameters:

PAIR - Type of (point, value) pair.

All Implemented Interfaces:

ConvergenceChecker<PAIR>

Direct Known Subclasses:

SimplePointChecker, SimpleUnivariateValueChecker, SimpleValueChecker, SimpleVectorValueChecker

public abstract class AbstractConvergenceChecker<PAIR>
extends Object
implements ConvergenceChecker<PAIR>

Base class for all convergence checker implementations.

Since:

3.0

Version:

$Id: AbstractConvergenceChecker.java 1435539 2013-01-19 13:27:24Z tn $

Field Summary

private double	absoluteThreshold Absolute tolerance threshold.
private double	relativeThreshold Relative tolerance threshold.

Constructor Summary

AbstractConvergenceChecker(double relativeThreshold, double absoluteThreshold)
Build an instance with a specified thresholds.

Method Summary

abstract boolean	converged(int iteration, PAIR previous, PAIR current) Check if the optimization algorithm has converged.
double	getAbsoluteThreshold()
double	getRelativeThreshold()

Methods inherited from class java.lang.Object

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

Field Detail

relativeThreshold

private final double relativeThreshold

Relative tolerance threshold.

absoluteThreshold

private final double absoluteThreshold

Absolute tolerance threshold.

Constructor Detail

AbstractConvergenceChecker

public AbstractConvergenceChecker(double relativeThreshold,
                                  double absoluteThreshold)

Build an instance with a specified thresholds.

Parameters:

relativeThreshold - relative tolerance threshold

absoluteThreshold - absolute tolerance threshold

Method Detail

getRelativeThreshold

public double getRelativeThreshold()

Returns:

the relative threshold.

getAbsoluteThreshold

public double getAbsoluteThreshold()

Returns:

the absolute threshold.

converged

public abstract boolean converged(int iteration,
                                  PAIR previous,
                                  PAIR current)

Check if the optimization algorithm has converged.

Specified by:

converged in interface ConvergenceChecker<PAIR>

Parameters:

iteration - Current iteration.

previous - Best point in the previous iteration.

current - Best point in the current iteration.

Returns:

true if the algorithm is considered to have converged.