org.joone.structure
Class Connection

java.lang.Object
  org.joone.structure.Connection

public class Connection
extends java.lang.Object

A connection between two nodes..

Author:

mg

Field Summary

protected double	delta The accumulated delta of the weight.
protected boolean	fixed True if this is a fixed connection
protected Node	node The node from which this connection originates
protected double	weight The weight of this connection

Constructor Summary

Connection(Node node, double weight, boolean fixed)
Create a new connection

Method Summary

double	getDelta() Retrieve the current delta
Node	getNode() Retrieve the node
double	getOutputValue(int pattern) Retrieve the output value of this connection.
double	getWeight() Retrieve the weight
boolean	isFixed() See if this is a fixed weight connection
void	setDelta(double delta) Set the delta
void	setWeight(double weight) Set the weight to a new value unless it is fixed
void	updateDelta(double increment) Add the given increment amount to the delta
void	updateWeight() Update the weight - if it is not fixed - by adding the internal delta to it and also resets that delta to zero afterwards.
void	updateWeight(double delta) Update the weight - if it is not fixed - by adding the given delta to it

Methods inherited from class java.lang.Object

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

Field Detail

node

protected Node node

The node from which this connection originates

weight

protected double weight

The weight of this connection

delta

protected double delta

The accumulated delta of the weight. This is a utility variable that is used during training to store the weight deltas to apply at a later stage.

fixed

protected boolean fixed

True if this is a fixed connection

Constructor Detail

Connection

public Connection(Node node,
                  double weight,
                  boolean fixed)

Create a new connection

Parameters:

node - node from which this links

weight - weight attached to the node

fixed - if true, then this weight is fixed and can not be changed

Method Detail

getNode

public Node getNode()

Retrieve the node

getWeight

public double getWeight()

Retrieve the weight

getDelta

public double getDelta()

Retrieve the current delta

isFixed

public boolean isFixed()

See if this is a fixed weight connection

getOutputValue

public double getOutputValue(int pattern)

Retrieve the output value of this connection. This is basically the input node's value at the given pattern times the current value of the weight.

Parameters:

pattern - pattern number

setWeight

public void setWeight(double weight)

Set the weight to a new value unless it is fixed

updateWeight

public void updateWeight(double delta)

Update the weight - if it is not fixed - by adding the given delta to it

updateWeight

public void updateWeight()

Update the weight - if it is not fixed - by adding the internal delta to it and also resets that delta to zero afterwards.

setDelta

public void setDelta(double delta)

Set the delta

updateDelta

public void updateDelta(double increment)

Add the given increment amount to the delta