GClasses::GActivationLogistic Class Reference

The logistic activation function. More...

#include <GActivation.h>

Inheritance diagram for GClasses::GActivationLogistic:

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 ()
	Returns -2.0. More...
virtual double	identityDiag ()
	Returns 4.0. 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 logistic function. Returns 1.0/(e^(-x)+1.0) 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

The logistic activation function.

Member Function Documentation

virtual double GClasses::GActivationLogistic::center ( )

inlinevirtual

Returns 0.5.

Implements GClasses::GActivationFunction.

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

inlinevirtual

See the comment for GActivationFunction::clone.

Implements GClasses::GActivationFunction.

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

inlinevirtual

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

Implements GClasses::GActivationFunction.

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

inlinevirtual

Returns y*(1.0-y)

Reimplemented from GClasses::GActivationFunction.

virtual double GClasses::GActivationLogistic::halfRange ( )

inlinevirtual

Returns 0.5.

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogistic::identityBias ( )

inlinevirtual

Returns -2.0.

Implements GClasses::GActivationFunction.

virtual double GClasses::GActivationLogistic::identityDiag ( )

inlinevirtual

Returns 4.0.

Implements GClasses::GActivationFunction.

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

inlinevirtual

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

Implements GClasses::GActivationFunction.

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

inlinevirtual

Returns the name of this activation function.

Implements GClasses::GActivationFunction.

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

inlinevirtual

The logistic function. Returns 1.0/(e^(-x)+1.0)

Implements GClasses::GActivationFunction.