org.encog.neural.activation
Class ActivationTANH

java.lang.Object
  org.encog.neural.activation.ActivationTANH

All Implemented Interfaces:

java.io.Serializable, ActivationFunction, EncogPersistedObject

public class ActivationTANH
extends java.lang.Object
implements ActivationFunction

ActivationTANH: The hyperbolic tangent activation function takes the curved shape of the hyperbolic tangent. This activation function produces both positive and negative output. Use this activation function if both negative and positive output is desired.

See Also:

Serialized Form

Constructor Summary

ActivationTANH()

Method Summary

double	activationFunction(double d) A threshold function for a neural network.
double	derivativeFunction(double d) Some training methods require the derivative.

Methods inherited from class java.lang.Object

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

Constructor Detail

ActivationTANH

public ActivationTANH()

Method Detail

activationFunction

public double activationFunction(double d)

A threshold function for a neural network.

Specified by:

activationFunction in interface ActivationFunction

Parameters:

d - The input to the function.

Returns:

The output from the function.

derivativeFunction

public double derivativeFunction(double d)

Some training methods require the derivative.

Specified by:

derivativeFunction in interface ActivationFunction

Parameters:

d - The input.

Returns:

The output.