org.encog.mathutil.matrices.hessian
Class ChainRuleWorker

java.lang.Object
  extended by org.encog.mathutil.matrices.hessian.ChainRuleWorker
All Implemented Interfaces:
EngineTask

public class ChainRuleWorker
extends Object
implements EngineTask

A threaded worker that is used to calculate the first derivatives of the output of the neural network. These values are ultimatly used to calculate the Hessian.


Constructor Summary
ChainRuleWorker(FlatNetwork theNetwork, MLDataSet theTraining, int theLow, int theHigh)
          Construct the chain rule worker.
 
Method Summary
 double[] getDerivative()
           
 double getError()
           
 double[] getGradients()
           
 double[][] getHessian()
           
 FlatNetwork getNetwork()
           
 int getOutputNeuron()
           
 void run()
          The task to perform.
 void setOutputNeuron(int outputNeuron)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ChainRuleWorker

public ChainRuleWorker(FlatNetwork theNetwork,
                       MLDataSet theTraining,
                       int theLow,
                       int theHigh)
Construct the chain rule worker.

Parameters:
theNetwork - The network to calculate a Hessian for.
theTraining - The training data.
theLow - The low range.
theHigh - The high range.
Method Detail

run

public void run()
The task to perform.

Specified by:
run in interface EngineTask

getOutputNeuron

public int getOutputNeuron()
Returns:
the outputNeuron

setOutputNeuron

public void setOutputNeuron(int outputNeuron)
Parameters:
outputNeuron - the outputNeuron to set

getDerivative

public double[] getDerivative()
Returns:
The first derivatives, used to calculate the Hessian.

getGradients

public double[] getGradients()
Returns:
the gradients

getError

public double getError()
Returns:
The SSE error.

getNetwork

public FlatNetwork getNetwork()
Returns:
The flat network.

getHessian

public double[][] getHessian()
Returns:
the hessian


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