org.encog.neural.som.training.basic.neighborhood
Class NeighborhoodBubble

java.lang.Object
  org.encog.neural.som.training.basic.neighborhood.NeighborhoodBubble

All Implemented Interfaces:

NeighborhoodFunction

public class NeighborhoodBubble
extends Object
implements NeighborhoodFunction

A neighborhood function that uses a simple bubble. A radius is defined, and any neuron that is plus or minus that width from the winning neuron will be updated as a result of training.

Author:

jheaton

Constructor Summary

NeighborhoodBubble(int radius)
Create a bubble neighborhood function that will return 1.0 (full update) for any neuron that is plus or minus the width distance from the winning neuron.

Method Summary

double	function(int currentNeuron, int bestNeuron) Determine how much the current neuron should be affected by training based on its proximity to the winning neuron.
double	getRadius()
void	setRadius(double radius) Set the radius.

Methods inherited from class java.lang.Object

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

Constructor Detail

NeighborhoodBubble

public NeighborhoodBubble(int radius)

Create a bubble neighborhood function that will return 1.0 (full update) for any neuron that is plus or minus the width distance from the winning neuron.

Parameters:

radius - The width of the bubble, this is the distance that the neuron can be from the winning neuron. The true width, across the bubble, is actually two times this parameter.

Method Detail

function

public final double function(int currentNeuron,
                             int bestNeuron)

Determine how much the current neuron should be affected by training based on its proximity to the winning neuron.

Specified by:

function in interface NeighborhoodFunction

Parameters:

currentNeuron - THe current neuron being evaluated.

bestNeuron - The winning neuron.

Returns:

The ratio for this neuron's adjustment.

getRadius

public final double getRadius()

Specified by:

getRadius in interface NeighborhoodFunction

Returns:

The radius.

setRadius

public final void setRadius(double radius)

Set the radius.

Specified by:

setRadius in interface NeighborhoodFunction

Parameters:

radius - The new radius.