edu.udo.cs.yale.tools.math.som
Class RitterAdaption

java.lang.Object
  edu.udo.cs.yale.tools.math.som.RitterAdaption

All Implemented Interfaces:

AdaptionFunction

public class RitterAdaption
extends java.lang.Object
implements AdaptionFunction

The RitterAdaption provides an implementation of the AdaptionFunction interface for calculation the adaption of a node to an input stimulus.

Version:

$Id$

Author:

Sebastian Land

Field Summary

private double	adaptionRadiusCurrent
private double	adaptionRadiusEnd
private double	adaptionRadiusStart
private int	lastTime
private double	learnRateCurrent
private double	learnRateEnd
private double	learnRateStart

Constructor Summary

RitterAdaption()

Method Summary

double[]	adapt(double[] stimulus, double[] nodeValue, double distanceFromImpact, int time, int maxtime) This method returns the new value of a node, after it had adopted to a stimulus.
double	getAdaptionRadius(double[] stimulus, int time, int maxtime) This method returns the maximum adaption radius, given the input stimulus, the current trainingsphase (time) and the total number of trainingsphases (timemax).
private double	getAdaptionRadius(int time, int maxtime)
void	setAdaptionRadiusEnd(double end)
void	setAdaptionRadiusStart(double start)
void	setLearnRateEnd(double end)
void	setLearnRateStart(double start)

Methods inherited from class java.lang.Object

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

Field Detail

learnRateStart

private double learnRateStart

learnRateEnd

private double learnRateEnd

adaptionRadiusStart

private double adaptionRadiusStart

adaptionRadiusEnd

private double adaptionRadiusEnd

lastTime

private int lastTime

learnRateCurrent

private double learnRateCurrent

adaptionRadiusCurrent

private double adaptionRadiusCurrent

Constructor Detail

RitterAdaption

public RitterAdaption()

Method Detail

adapt

public double[] adapt(double[] stimulus,
                      double[] nodeValue,
                      double distanceFromImpact,
                      int time,
                      int maxtime)

Description copied from interface: AdaptionFunction

This method returns the new value of a node, after it had adopted to a stimulus. The stimulus and the old node value are given. The distance from the impact of the stimulus may influence the strength of the adoption to the stimulus, as may the current trainingsphase (time) and the total number of trainingsphases (timemax)

Specified by:

adapt in interface AdaptionFunction

getAdaptionRadius

public double getAdaptionRadius(double[] stimulus,
                                int time,
                                int maxtime)

Description copied from interface: AdaptionFunction

This method returns the maximum adaption radius, given the input stimulus, the current trainingsphase (time) and the total number of trainingsphases (timemax). It may be used for finding all nodes effected by the stimulus.

Specified by:

getAdaptionRadius in interface AdaptionFunction

getAdaptionRadius

private double getAdaptionRadius(int time,
                                 int maxtime)

setAdaptionRadiusStart

public void setAdaptionRadiusStart(double start)

setAdaptionRadiusEnd

public void setAdaptionRadiusEnd(double end)

setLearnRateStart

public void setLearnRateStart(double start)

setLearnRateEnd

public void setLearnRateEnd(double end)