The Term class is the abstract class for linguistic terms. More...

#include <Term.h>

Inheritance diagram for fl::Term:

Collaboration diagram for fl::Term:

Public Member Functions
	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 std::string	className () const =0
	Returns the name of the class of the term. More...

virtual std::string	parameters () const =0
	Returns the parameters to configure the term. More...

virtual void	configure (const std::string &parameters)=0
	Configures the term with the given parameters. More...

virtual Complexity	complexity () const =0
	Computes the estimated complexity of evaluating the membership function. More...

virtual scalar	membership (scalar x) const =0
	Computes the membership function value at \(x\). More...

virtual Term *	clone () const =0
	Creates a clone of the term. 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...

Protected Attributes
scalar	_height

Detailed Description

The Term class is the abstract class for linguistic terms.

The linguistic terms in this library can be divided in four groups as: basic, extended, edge, and function. The basic terms are Triangle, Trapezoid, Rectangle, and Discrete. The extended terms are Bell, Binary, Cosine, Gaussian, GaussianProduct, PiShape, SigmoidDifference, SigmoidProduct, and Spike. The edge terms are Concave, Ramp, Sigmoid, SShape, and ZShape. The function terms are Constant, Linear, and Function.

In the figure below, the basic terms are represented in the first column, and the extended terms in the second and third columns. The edge terms are represented in the fifth and sixth rows, and the function terms in the last row.

Author: Juan Rada-Vilela, Ph.D.

See also: Variable; InputVariable; OutputVariable

Since: 4.0

Definition at line 55 of file Term.h.

Constructor & Destructor Documentation

◆ Term()

fl::Term::Term	(	const std::string &	name = `""`,
		scalar	height = `1.0`
	)

explicit

◆ ~Term()

virtual fl::Term::~Term ( )

virtual

Member Function Documentation

◆ className()

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

pure virtual

Returns the name of the class of the term.

Returns: the name of the class of the term

Implemented in fl::Function, fl::Aggregated, fl::Binary, fl::Sigmoid, fl::Ramp, fl::Discrete, fl::GaussianProduct, fl::PiShape, fl::SigmoidDifference, fl::SigmoidProduct, fl::Linear, fl::Activated, fl::Bell, fl::Triangle, fl::Gaussian, fl::Trapezoid, fl::ZShape, fl::Cosine, fl::Rectangle, fl::SShape, fl::Concave, fl::Spike, and fl::Constant.

◆ clone()

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

pure virtual

Creates a clone of the term.

Returns: a clone of the term

Implemented in fl::Function, fl::Discrete, fl::GaussianProduct, fl::PiShape, fl::Ramp, fl::Binary, fl::SigmoidProduct, fl::SigmoidDifference, fl::Trapezoid, fl::Linear, fl::Sigmoid, fl::Triangle, fl::Bell, fl::Activated, fl::Concave, fl::ZShape, fl::SShape, fl::Rectangle, fl::Cosine, fl::Gaussian, fl::Spike, fl::Aggregated, and fl::Constant.

◆ complexity()

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

pure virtual

Computes the estimated complexity of evaluating the membership function.

Returns: the estimated complexity of evaluating the membership function

Implemented in fl::Function, fl::Discrete, fl::Aggregated, fl::Binary, fl::Sigmoid, fl::Ramp, fl::GaussianProduct, fl::PiShape, fl::Linear, fl::SigmoidDifference, fl::SigmoidProduct, fl::Activated, fl::Bell, fl::Triangle, fl::Gaussian, fl::Trapezoid, fl::ZShape, fl::Cosine, fl::Rectangle, fl::SShape, fl::Concave, fl::Spike, and fl::Constant.

◆ configure()

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

pure virtual

Configures the term with the given parameters.

The parameters are separated by spaces. If there is one additional parameter, the parameter will be considered as the height of the term; otherwise, the height will be set to \(1.0\)

Parameters

parameters is the parameters to configure the term

Implemented in fl::Function, fl::Aggregated, fl::Binary, fl::Sigmoid, fl::Ramp, fl::Discrete, fl::GaussianProduct, fl::PiShape, fl::Linear, fl::SigmoidDifference, fl::SigmoidProduct, fl::Activated, fl::Bell, fl::Triangle, fl::Gaussian, fl::Trapezoid, fl::ZShape, fl::Cosine, fl::Rectangle, fl::SShape, fl::Concave, fl::Spike, and fl::Constant.

◆ getHeight()

virtual scalar fl::Term::getHeight ( ) const

virtual

Gets the height of the term.

Returns: the height of the term

◆ getName()

virtual std::string fl::Term::getName ( ) const

virtual

Gets the name of the term.

Returns: the name of the term

◆ membership()

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

pure virtual

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

Parameters

x

Returns: the membership function value \(\mu(x)\)

Implemented in fl::Function, fl::Ramp, fl::Discrete, fl::Aggregated, fl::Binary, fl::GaussianProduct, fl::PiShape, fl::Sigmoid, fl::SigmoidDifference, fl::SigmoidProduct, fl::Trapezoid, fl::Triangle, fl::Concave, fl::ZShape, fl::SShape, fl::Bell, fl::Linear, fl::Rectangle, fl::Cosine, fl::Gaussian, fl::Activated, fl::Spike, and fl::Constant.

◆ parameters()

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

pure virtual

Returns the parameters to configure the term.

The parameters are separated by spaces. If there is one additional parameter, the parameter will be considered as the height of the term; otherwise, the height will be set to \(1.0\)

Returns: the parameters to configure the term (

See also: Term::configure())

Implemented in fl::Function, fl::Aggregated, fl::Binary, fl::Sigmoid, fl::Ramp, fl::Discrete, fl::GaussianProduct, fl::Linear, fl::PiShape, fl::SigmoidDifference, fl::SigmoidProduct, fl::Activated, fl::Bell, fl::Triangle, fl::Gaussian, fl::Trapezoid, fl::ZShape, fl::Cosine, fl::Rectangle, fl::SShape, fl::Concave, fl::Spike, and fl::Constant.

◆ setHeight()

virtual void fl::Term::setHeight ( scalar height )

virtual

Sets the height of the term.

Parameters

height is the height of the term

◆ setName()

virtual void fl::Term::setName ( const std::string & name )

virtual

Sets the name of the term.

Parameters

name	is the name of term

◆ toString()

virtual std::string fl::Term::toString ( ) const

virtual

Returns the representation of the term in the FuzzyLite Language.

Returns: the representation of the term in FuzzyLite Language

See also: FllExporter

Reimplemented in fl::Aggregated, and fl::Activated.

◆ updateReference()

virtual void fl::Term::updateReference ( const Engine * engine )

virtual

Updates the references (if any) to point to the current engine (useful when cloning engines or creating terms within Importer objects.

Parameters

engine is the engine to which this term belongs to

Reimplemented in fl::Function, and fl::Linear.

Member Data Documentation

◆ _height

scalar fl::Term::_height

protected

Definition at line 59 of file Term.h.

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

fuzzylite/fl/term/Term.h

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Term()

◆ ~Term()

Member Function Documentation

◆ className()

◆ clone()

◆ complexity()

◆ configure()

◆ getHeight()

◆ getName()

◆ membership()

◆ parameters()

◆ setHeight()

◆ setName()

◆ toString()

◆ updateReference()

Member Data Documentation

◆ _height