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

java.lang.Object
  extended by 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 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 double getRadius()
Specified by:
getRadius in interface NeighborhoodFunction
Returns:
The radius.

setRadius

public void setRadius(double radius)
Set the radius.

Specified by:
setRadius in interface NeighborhoodFunction
Parameters:
radius - The new radius.


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