fl::Trapezoid Class Reference

The Trapezoid class is a basic Term that represents the trapezoidal membership function. More...

#include <Trapezoid.h>

Inheritance diagram for fl::Trapezoid:

Collaboration diagram for fl::Trapezoid:

Public Member Functions
	Trapezoid (const std::string &name="", scalar vertexA=fl::nan, scalar vertexB=fl::nan, scalar vertexC=fl::nan, scalar vertexD=fl::nan, scalar height=1.0)
virtual	~Trapezoid () 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. More...
virtual void	configure (const std::string &parameters) FL_IOVERRIDE
	Configures the term with the parameters. 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 void	setVertexA (scalar a)
	Sets the first vertex of the trapezoid. More...
virtual scalar	getVertexA () const
	Gets the first vertex of the trapezoid. More...
virtual void	setVertexB (scalar b)
	Sets the second vertex of the trapezoid. More...
virtual scalar	getVertexB () const
	Gets the second vertex of the trapezoid. More...
virtual void	setVertexC (scalar c)
	Sets the third vertex of the trapezoid. More...
virtual scalar	getVertexC () const
	Gets the third vertex of the trapezoid. More...
virtual void	setVertexD (scalar d)
	Sets the fourth vertex of the trapezoid. More...
virtual scalar	getVertexD () const
	Gets the fourth vertex of the trapezoid. More...
virtual Trapezoid *	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 Trapezoid class is a basic Term that represents the trapezoidal membership function.

Author

Juan Rada-Vilela, Ph.D.

See also

Term

Variable

Since

4.0

Definition at line 35 of file Trapezoid.h.

Constructor & Destructor Documentation

Trapezoid()

fl::Trapezoid::Trapezoid ( const std::string &  name = "", scalar  vertexA = fl::nan, scalar  vertexB = fl::nan, scalar  vertexC = fl::nan, scalar  vertexD = fl::nan, scalar  height = 1.0  )

explicit

~Trapezoid()

virtual fl::Trapezoid::~Trapezoid ( )

virtual

Member Function Documentation

className()

virtual std::string fl::Trapezoid::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 Trapezoid* fl::Trapezoid::clone ( ) const

virtual

Creates a clone of the term.

Returns

a clone of the term

Implements fl::Term.

complexity()

virtual Complexity fl::Trapezoid::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::Trapezoid::configure ( const std::string &  parameters )

virtual

Configures the term with the parameters.

Parameters

parameters

as "vertexA vertexB vertexC vertexD [height]"

Implements fl::Term.

constructor()

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

static

getVertexA()

virtual scalar fl::Trapezoid::getVertexA ( ) const

virtual

Gets the first vertex of the trapezoid.

Returns

the first vertex of the trapezoid

getVertexB()

virtual scalar fl::Trapezoid::getVertexB ( ) const

virtual

Gets the second vertex of the trapezoid.

Returns

the second vertex of the trapezoid

getVertexC()

virtual scalar fl::Trapezoid::getVertexC ( ) const

virtual

Gets the third vertex of the trapezoid.

Returns

the third vertex of the trapezoid

getVertexD()

virtual scalar fl::Trapezoid::getVertexD ( ) const

virtual

Gets the fourth vertex of the trapezoid.

Returns

the fourth vertex of the trapezoid

membership()

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

virtual

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

Parameters

x

Returns

\(\begin{cases} 0h & \mbox{if $x \not\in[a,d]$}\cr h \times \min(1, (x - a) / (b - a)) & \mbox{if $x < b$}\cr 1h & \mbox{if $x \leq c$}\cr h (d - x) / (d - c) & \mbox{if $x < d$}\cr 0h & \mbox{otherwise} \end{cases}\)

where \(h\) is the height of the Term, \(a\) is the first vertex of the Trapezoid, \(b\) is the second vertex of the Trapezoid, \(c\) is the third vertex of the Trapezoid, \(d\) is the fourth vertex of the Trapezoid

Implements fl::Term.

parameters()

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

virtual

Returns the parameters of the term.

Returns

"vertexA vertexB vertexC vertexD [height]"

Implements fl::Term.

setVertexA()

virtual void fl::Trapezoid::setVertexA ( scalar  a )

virtual

Sets the first vertex of the trapezoid.

Parameters

a	is the first vertex of the trapezoid

setVertexB()

virtual void fl::Trapezoid::setVertexB ( scalar  b )

virtual

Sets the second vertex of the trapezoid.

Parameters

b	is the second vertex of the trapezoid

setVertexC()

virtual void fl::Trapezoid::setVertexC ( scalar  c )

virtual

Sets the third vertex of the trapezoid.

Parameters

c	is the third vertex of the trapezoid

setVertexD()

virtual void fl::Trapezoid::setVertexD ( scalar  d )

virtual

Sets the fourth vertex of the trapezoid.

Parameters

d	is the fourth vertex of the trapezoid

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

• fuzzylite/fl/term/Trapezoid.h