SigmoidalFS Class Reference

FuzzySet with sigmoidal membership function. More...

#include <SigmoidalFS.h>

Inheritance diagram for SigmoidalFS:

List of all members.

Public Member Functions

SigmoidalFS (double paramC=1, double paramOffset=0)

Constructor.

double getMin () const

Returns the lower boundary of the support.

double getMax () const

Returns the upper boundary of the support.

double getThreshold () const

Returns the threshold for which the membership function (for which the x axis is the asymptote) is set to be zero in the numerical intergration.

void setThreshold (double thr)

Sets the threshold for which the membership function (for which the x axis is the asymptote) is set to be zero in the numerical intergration.

void setParams (double paramC, double paramOffset)

Sets the parameters of the fuzzy set.

Detailed Description

FuzzySet with sigmoidal membership function.

This class implements a FuzzySet with membership function:

$\mu(x) = \frac{1}{1 + e^{-a(x-b)}}$

Definition at line 32 of file SigmoidalFS.h.

Constructor & Destructor Documentation

SigmoidalFS::SigmoidalFS	(	double	paramC = `1`,
		double	paramOffset = `0`
	)			`[inline]`

Constructor.

Parameters:

	paramC	scale factor for y-axis
	paramOffset	position of inflection point

Definition at line 41 of file SigmoidalFS.h.

Member Function Documentation

double SigmoidalFS::getMax ( ) const [inline, virtual]

Returns the upper boundary of the support.

Returns:: the max. value for which the membership function is nonzero (or exceeds a given threshold)

Implements FuzzySet.

Reimplemented in SigmoidalLT.

Definition at line 71 of file SigmoidalFS.h.

Referenced by SigmoidalLT::getMax().

double SigmoidalFS::getMin ( ) const [inline, virtual]

Returns the lower boundary of the support.

Returns:: the min. value for which the membership function is nonzero (or exceeds a given threshold)

Implements FuzzySet.

Reimplemented in SigmoidalLT.

Definition at line 55 of file SigmoidalFS.h.

Referenced by SigmoidalLT::getMin().

double SigmoidalFS::getThreshold ( ) const [inline]

Returns the threshold for which the membership function (for which the x axis is the asymptote) is set to be zero in the numerical intergration.

Returns:: the threshold

Definition at line 81 of file SigmoidalFS.h.

void SigmoidalFS::setParams	(	double	paramC,
		double	paramOffset
	)			`[inline]`

Sets the parameters of the fuzzy set.

Parameters:

	paramC
	paramOffset

Definition at line 29 of file SigmoidalFS.cpp.

void SigmoidalFS::setThreshold ( double thr )

Sets the threshold for which the membership function (for which the x axis is the asymptote) is set to be zero in the numerical intergration.

Parameters:

thr

the threshold

Definition at line 21 of file SigmoidalFS.cpp.

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


Public Member Functions
	SigmoidalFS (double paramC=1, double paramOffset=0)
	Constructor.
double	getMin () const
	Returns the lower boundary of the support.
double	getMax () const
	Returns the upper boundary of the support.
double	getThreshold () const
	Returns the threshold for which the membership function (for which the x axis is the asymptote) is set to be zero in the numerical intergration.
void	setThreshold (double thr)
	Sets the threshold for which the membership function (for which the x axis is the asymptote) is set to be zero in the numerical intergration.
void	setParams (double paramC, double paramOffset)
	Sets the parameters of the fuzzy set.