fuzzylite  6.0 A Fuzzy Logic Control Library in C++
fl::Triangle Class Reference

The Triangle class is a basic Term that represents the triangular membership function. More...

#include <Triangle.h>

Inheritance diagram for fl::Triangle:
Collaboration diagram for fl::Triangle:

## Public Member Functions

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

virtual ~Triangle () 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 triangle. More...

virtual scalar getVertexA () const
Gets the first vertex of the triangle. More...

virtual void setVertexB (scalar b)
Sets the second vertex of the triangle. More...

virtual scalar getVertexB () const
Gets the second vertex of the triangle. More...

virtual void setVertexC (scalar c)
Sets the third vertex of the triangle. More...

virtual scalar getVertexC () const
Gets the third vertex of the triangle. More...

virtual Triangleclone () 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 Termconstructor ()

Protected Attributes inherited from fl::Term
scalar _height

## Detailed Description

The Triangle class is a basic Term that represents the triangular membership function.

Term
Variable
Since
4.0

Definition at line 35 of file Triangle.h.

## ◆ Triangle()

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

## ◆ ~Triangle()

 virtual fl::Triangle::~Triangle ( )
virtual

## ◆ className()

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

Creates a clone of the term.

Returns
a clone of the term

Implements fl::Term.

## ◆ complexity()

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

Configures the term with the parameters.

Parameters
 parameters as "vertexA vertexB vertexC [height]"

Implements fl::Term.

## ◆ constructor()

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

## ◆ getVertexA()

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

Gets the first vertex of the triangle.

Returns
the first vertex of the triangle

## ◆ getVertexB()

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

Gets the second vertex of the triangle.

Returns
the second vertex of the triangle

## ◆ getVertexC()

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

Gets the third vertex of the triangle.

Returns
the third vertex of the triangle

## ◆ membership()

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

Computes the membership function evaluated at $$x$$.

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

where $$h$$ is the height of the Term, $$a$$ is the first vertex of the Triangle, $$b$$ is the second vertex of the Triangle, $$c$$ is the third vertex of the Triangle

Implements fl::Term.

## ◆ parameters()

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

Returns the parameters of the term.

Returns
"vertexA vertexB vertexC [height]"

Implements fl::Term.

## ◆ setVertexA()

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

Sets the first vertex of the triangle.

Parameters
 a is the first vertex of the triangle

## ◆ setVertexB()

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

Sets the second vertex of the triangle.

Parameters
 b is the second vertex of the triangle

## ◆ setVertexC()

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

Sets the third vertex of the triangle.

Parameters
 c is the third vertex of the triangle

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