GClasses::GActivationLogisticDerivative Class Reference

Uses the derivative of the logistic function as an activation function. This is shaped somewhat like a bell-curve. More...

#include <GActivation.h>

Inheritance diagram for GClasses::GActivationLogisticDerivative:

Public Member Functions
virtual double	center ()
	Returns 0.5. More...
virtual GActivationFunction *	clone ()
	See the comment for GActivationFunction::clone. More...
virtual double	derivative (double x)
	Returns d*(1.0-d), where d=squash(x) More...
virtual double	derivativeOfNet (double net, double activation)
	Returns y*(1.0-y) More...
virtual double	halfRange ()
	Returns 0.5. More...
virtual double	identityBias ()
	Throws an exception. More...
virtual double	identityDiag ()
	Throws an exception. More...
virtual double	inverse (double y)
	The logit function. Returns log(y)-log(1.0-y) More...
virtual const char *	name () const
	Returns the name of this activation function. More...
virtual double	squash (double x)
	The derivative of the logistic function. More...
Public Member Functions inherited from GClasses::GActivationFunction
	GActivationFunction ()
virtual	~GActivationFunction ()
GDomNode *	serialize (GDom *pDoc) const
	Serialize this object. More...

Additional Inherited Members
Static Public Member Functions inherited from GClasses::GActivationFunction
static GActivationFunction *	deserialize (GDomNode *pNode)
	Deserialize this object. More...

Detailed Description

Uses the derivative of the logistic function as an activation function. This is shaped somewhat like a bell-curve.

Member Function Documentation

virtual double GClasses::GActivationLogisticDerivative::center ( )

inlinevirtual

Returns 0.5.

Implements GClasses::GActivationFunction.

virtual GActivationFunction* GClasses::GActivationLogisticDerivative::clone ( )

inlinevirtual

See the comment for GActivationFunction::clone.

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogisticDerivative::derivative ( double  x )

inlinevirtual

Returns d*(1.0-d), where d=squash(x)

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogisticDerivative::derivativeOfNet ( double  net, double  activation  )

inlinevirtual

Returns y*(1.0-y)

Reimplemented from GClasses::GActivationFunction.

virtual double GClasses::GActivationLogisticDerivative::halfRange ( )

inlinevirtual

Returns 0.5.

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogisticDerivative::identityBias ( )

inlinevirtual

Throws an exception.

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogisticDerivative::identityDiag ( )

inlinevirtual

Throws an exception.

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogisticDerivative::inverse ( double  y )

inlinevirtual

The logit function. Returns log(y)-log(1.0-y)

Implements GClasses::GActivationFunction.

virtual const char* GClasses::GActivationLogisticDerivative::name ( ) const

inlinevirtual

Returns the name of this activation function.

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogisticDerivative::squash ( double  x )

inlinevirtual

The derivative of the logistic function.

Implements GClasses::GActivationFunction.