org.encog.neural.activation
Class ActivationSigmoid

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

All Implemented Interfaces:

java.io.Serializable, ActivationFunction, EncogPersistedObject

public class ActivationSigmoid
extends java.lang.Object
implements ActivationFunction

ActivationSigmoid: The sigmoid activation function takes on a sigmoidal shape. Only positive numbers are generated. Do not use this activation function if negative number output is desired.

See Also:

Serialized Form

Constructor Summary

ActivationSigmoid()

Method Summary

double	activationFunction(double d) A threshold function for a neural network.
Persistor	createPersistor() Create a persistor for this object.
double	derivativeFunction(double d) Some training methods require the derivative.
java.lang.String	getDescription()
java.lang.String	getName()
void	setDescription(java.lang.String description)
void	setName(java.lang.String name)

Methods inherited from class java.lang.Object

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

Constructor Detail

ActivationSigmoid

public ActivationSigmoid()

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.

createPersistor

public Persistor createPersistor()

Create a persistor for this object.

Specified by:

createPersistor in interface EncogPersistedObject

Returns:

The new persistor.

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.

getDescription

public java.lang.String getDescription()

Specified by:

getDescription in interface EncogPersistedObject

Returns:

the description

getName

public java.lang.String getName()

Specified by:

getName in interface EncogPersistedObject

Returns:

the name

setDescription

public void setDescription(java.lang.String description)

Specified by:

setDescription in interface EncogPersistedObject

Parameters:

description - the description to set

setName

public void setName(java.lang.String name)

Specified by:

setName in interface EncogPersistedObject

Parameters:

name - the name to set