logistic function More...

#include <sigmoid.h>

Inheritance diagram for PsiLogistic:

Public Member Functions
	PsiLogistic (void)
	constructor
	PsiLogistic (const PsiLogistic &original)
	copy constructor
double	f (double x) const
	value of the sigmoid at position x
double	df (double x) const
	derivative of the sigmoid at position x
double	ddf (double x) const
	second derivative of the sigmoid
double	inv (double p) const
	inverse of the sigmoid
int	getcode (void) const
	return the sigmoid identifier
PsiSigmoid *	clone (void) const
	clone object by value
Static Public Member Functions
static std::string	getDescriptor (void)
	get a short string that identifies the type of sigmoid

Detailed Description

logistic function

The logistic function is given by f(x) = 1/(1+exp(-x))

Member Function Documentation

double PsiLogistic::f ( double x ) const [virtual]

value of the sigmoid at position x

Logistic Sigmoid

Reimplemented from PsiSigmoid.

The documentation for this class was generated from the following files: