fl::Concave Class Reference

The Concave class is an edge Term that represents the concave membership function. More...

#include <Concave.h>

Inheritance diagram for fl::Concave:

Collaboration diagram for fl::Concave:

Public Member Functions
	Concave (const std::string &name="", scalar inflection=fl::nan, scalar end=fl::nan, scalar height=1.0)
virtual	~Concave () FL_IOVERRIDE
virtual std::string	className () const FL_IOVERRIDE
	Returns the name of the class of the term. More...
virtual std::string	parameters () const FL_IOVERRIDE
	Returns the parameters of the term as. More...
virtual void	configure (const std::string &parameters) FL_IOVERRIDE
	Configures the term with the parameters given. More...
virtual Complexity	complexity () const FL_IOVERRIDE
	Computes the estimated complexity of evaluating the membership function. More...
virtual scalar	membership (scalar x) const FL_IOVERRIDE
	Computes the membership function evaluated at \(x\). More...
virtual scalar	tsukamoto (scalar activationDegree, scalar minimum, scalar maximum) const FL_IOVERRIDE
virtual bool	isMonotonic () const FL_IOVERRIDE
virtual void	setInflection (scalar inflection)
	Sets the inflection of the curve. More...
virtual scalar	getInflection () const
	Gets the inflection of the curve. More...
virtual void	setEnd (scalar end)
	Sets the end of the curve. More...
virtual scalar	getEnd () const
	Gets the end of the curve. More...
virtual Concave *	clone () const FL_IOVERRIDE
	Creates a clone of the term. More...
Public Member Functions inherited from fl::Term
	Term (const std::string &name="", scalar height=1.0)
virtual	~Term ()
virtual void	setName (const std::string &name)
	Sets the name of the term. More...
virtual std::string	getName () const
	Gets the name of the term. More...
virtual void	setHeight (scalar height)
	Sets the height of the term. More...
virtual scalar	getHeight () const
	Gets the height of the term. More...
virtual std::string	toString () const
	Returns the representation of the term in the FuzzyLite Language. More...
virtual void	updateReference (const Engine *engine)
	Updates the references (if any) to point to the current engine (useful when cloning engines or creating terms within Importer objects. More...

Static Public Member Functions
static Term *	constructor ()

Additional Inherited Members
Protected Attributes inherited from fl::Term
scalar	_height

Detailed Description

The Concave class is an edge Term that represents the concave membership function.

Author

Juan Rada-Vilela, Ph.D.

See also

Term

Variable

Since

5.0

Definition at line 35 of file Concave.h.

Constructor & Destructor Documentation

Concave()

fl::Concave::Concave ( const std::string &  name = "", scalar  inflection = fl::nan, scalar  end = fl::nan, scalar  height = 1.0  )

explicit

~Concave()

virtual fl::Concave::~Concave ( )

virtual

Member Function Documentation

className()

virtual std::string fl::Concave::className ( ) const

virtual

Returns the name of the class of the term.

Returns

the name of the class of the term

Implements fl::Term.

clone()

virtual Concave* fl::Concave::clone ( ) const

virtual

Creates a clone of the term.

Returns

a clone of the term

Implements fl::Term.

complexity()

virtual Complexity fl::Concave::complexity ( ) const

virtual

Computes the estimated complexity of evaluating the membership function.

Returns

the estimated complexity of evaluating the membership function

Implements fl::Term.

configure()

virtual void fl::Concave::configure ( const std::string &  parameters )

virtual

Configures the term with the parameters given.

Parameters

parameters

as "inflection end [height]"

Implements fl::Term.

constructor()

static Term* fl::Concave::constructor ( )

static

getEnd()

virtual scalar fl::Concave::getEnd ( ) const

virtual

Gets the end of the curve.

Returns

the end of the curve

getInflection()

virtual scalar fl::Concave::getInflection ( ) const

virtual

Gets the inflection of the curve.

Returns

the inflection of the curve

isMonotonic()

virtual bool fl::Concave::isMonotonic ( ) const

virtual

membership()

virtual scalar fl::Concave::membership ( scalar  x ) const

virtual

Computes the membership function evaluated at \(x\).

Parameters

x

Returns

\(\begin{cases} h \times (e - i) / (2e - i - x) & \mbox{if $i \leq e \wedge x < e$ (increasing concave)} \cr h \times (i - e) / (-2e + i + x) & \mbox{if $i > e \wedge x > e$ (decreasing concave)} \cr h & \mbox{otherwise} \cr \end{cases}\)

where \(h\) is the height of the Term, \(i\) is the inflection of the Concave, \(e\) is the end of the Concave

Implements fl::Term.

parameters()

virtual std::string fl::Concave::parameters ( ) const

virtual

Returns the parameters of the term as.

Returns

"inflection end [height]"

Implements fl::Term.

setEnd()

virtual void fl::Concave::setEnd ( scalar  end )

virtual

Sets the end of the curve.

Parameters

end	is the end of the curve

setInflection()

virtual void fl::Concave::setInflection ( scalar  inflection )

virtual

Sets the inflection of the curve.

Parameters

inflection

is the inflection of the curve

tsukamoto()

virtual scalar fl::Concave::tsukamoto ( scalar  activationDegree, scalar  minimum, scalar  maximum  ) const

virtual

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

• fuzzylite/fl/term/Concave.h