weka.classifiers.functions.activation

Class Softplus

java.lang.Object

weka.classifiers.functions.activation.Softplus

All Implemented Interfaces:

java.io.Serializable, ActivationFunction

public class Softplus
extends java.lang.Object
implements ActivationFunction

Computes softplus activation function f(x) = ln(1 + e^(x))

Version:

$Revision: 10949 $

Author:

Eibe Frank (eibe@cs.waikato.ac.nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Softplus()

Method Summary

Modifier and Type	Method and Description
double	activation(double x, double[] d, int index) Computes softplus activation function.
java.lang.String	globalInfo() Returns info for this class.

Methods inherited from class java.lang.Object

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

Constructor Detail

Softplus

public Softplus()

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns info for this class.

activation

public double activation(double x,
                         double[] d,
                         int index)

Computes softplus activation function. Derivative is stored in d at position index if argument d != null.

Specified by:

activation in interface ActivationFunction