mulan.classifier.neural.model
Class ActivationTANH

java.lang.Object
  mulan.classifier.neural.model.ActivationFunction
      mulan.classifier.neural.model.ActivationTANH

All Implemented Interfaces:

Serializable

public class ActivationTANH
extends ActivationFunction

Implements the hyperbolic tangent activation function. The function output values are from interval <-1,1>.

Version:

2012.02.27

Author:

Jozef Vilcek

See Also:

Serialized Form

Field Summary

static double	MAX Maximum value of function
static double	MIN Minimum value of function

Constructor Summary

ActivationTANH()

Method Summary

double	activate(double input) Computes an output value of the function for given input.
double	derivative(double input) Computes an output value of function derivation for given input.
double	getMax() Gets the maximum value the function can output.
double	getMin() Gets the minimum value the function can output.

Methods inherited from class java.lang.Object

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

Field Detail

MAX

public static final double MAX

Maximum value of function

See Also:

Constant Field Values

MIN

public static final double MIN

Minimum value of function

See Also:

Constant Field Values

Constructor Detail

ActivationTANH

public ActivationTANH()

Method Detail

activate

public double activate(double input)

Description copied from class: ActivationFunction

Computes an output value of the function for given input.

Specified by:

activate in class ActivationFunction

Parameters:

input - the input value to the function

Returns:

the output value

derivative

public double derivative(double input)

Description copied from class: ActivationFunction

Computes an output value of function derivation for given input.

Specified by:

derivative in class ActivationFunction

Parameters:

input - the input value to the function

Returns:

the output value

getMax

public double getMax()

Description copied from class: ActivationFunction

Gets the maximum value the function can output.

Specified by:

getMax in class ActivationFunction

Returns:

maximum value of the function

getMin

public double getMin()

Description copied from class: ActivationFunction

Gets the minimum value the function can output.

Specified by:

getMin in class ActivationFunction

Returns:

minimum value of the function