The Antecedent class is an expression tree that represents and evaluates the antecedent of a Rule. More...

#include <Antecedent.h>

Collaboration diagram for fl::Antecedent:

Public Member Functions
	Antecedent ()

virtual	~Antecedent ()

virtual void	setText (const std::string &text)
	Sets the antecedent in text. More...

virtual std::string	getText () const
	Gets the antecedent in text. More...

virtual Expression *	getExpression () const
	Gets the expression tree of the antecedent. More...

virtual void	setExpression (Expression *expression)
	Sets the expression tree of the antecedent. More...

virtual bool	isLoaded () const
	Indicates whether the antecedent is loaded. More...

virtual void	unload ()
	Unloads the antecedent. More...

virtual void	load (const Engine *engine)
	Loads the antecedent with the text obtained from Antecedent::getText() and uses the engine to identify and retrieve references to the input variables and output variables as required. More...

virtual void	load (const std::string &antecedent, const Engine *engine)
	Loads the antecedent with the given text and uses the engine to identify and retrieve references to the input variables and output variables as required. More...

virtual Complexity	complexity (const TNorm conjunction, const SNorm disjunction) const
	Computes the estimated complexity of calculating the activation degree. More...

virtual Complexity	complexity (const TNorm conjunction, const SNorm disjunction, const Expression *node) const
	Computes the estimated complexity of recursively calculating the activation degree from the given node. More...

virtual scalar	activationDegree (const TNorm conjunction, const SNorm disjunction, const Expression *node) const
	Computes the activation degree of the antecedent on the expression tree from the given node. More...

virtual scalar	activationDegree (const TNorm conjunction, const SNorm disjunction) const
	Computes the activation degree of the antecedent on the expression tree from the root node. More...

virtual std::string	toString () const
	Returns a string representation of the expression tree in infix notation. More...

virtual std::string	toPrefix (const Expression *node=fl::null) const
	Returns a string represention of the given expression tree utilizing prefix notation. More...

virtual std::string	toInfix (const Expression *node=fl::null) const
	Returns a string represention of the given expression tree utilizing infix notation. More...

virtual std::string	toPostfix (const Expression *node=fl::null) const
	Returns a string represention of the given expression tree utilizing postfix notation. More...

Detailed Description

The Antecedent class is an expression tree that represents and evaluates the antecedent of a Rule.

The structure of a rule is: if (antecedent) then (consequent). The structure of the antecedent of a rule is:

if variable is [hedge]* term [(and|or) variable is [hedge]* term]*

where *-marked elements may appear zero or more times, elements in brackets are optional, and elements in parentheses are compulsory.

Author: Juan Rada-Vilela, Ph.D.

See also: Consequent; Rule

Since: 4.0

Definition at line 48 of file Antecedent.h.

Constructor & Destructor Documentation

◆ Antecedent()

fl::Antecedent::Antecedent ( )

◆ ~Antecedent()

virtual fl::Antecedent::~Antecedent ( )

virtual

Member Function Documentation

◆ activationDegree() [1/2]

virtual scalar fl::Antecedent::activationDegree	(	const TNorm *	conjunction,
		const SNorm *	disjunction,
		const Expression *	node
	)		const

virtual

Computes the activation degree of the antecedent on the expression tree from the given node.

Parameters

conjunction	is the conjunction operator from the RuleBlock
disjunction	is the disjunction operator from the RuleBlock
node	is a node in the expression tree of the antecedent

Returns: the activation degree of the antecedent

◆ activationDegree() [2/2]

virtual scalar fl::Antecedent::activationDegree	(	const TNorm *	conjunction,
		const SNorm *	disjunction
	)		const

virtual

Computes the activation degree of the antecedent on the expression tree from the root node.

Parameters

conjunction	is the conjunction operator from the RuleBlock
disjunction	is the disjunction operator from the RuleBlock

Returns: the activation degree of the antecedent on the expression tree

◆ complexity() [1/2]

virtual Complexity fl::Antecedent::complexity	(	const TNorm *	conjunction,
		const SNorm *	disjunction
	)		const

virtual

Computes the estimated complexity of calculating the activation degree.

Returns: the estimated complexity of calculating the activation degree

◆ complexity() [2/2]

virtual Complexity fl::Antecedent::complexity	(	const TNorm *	conjunction,
		const SNorm *	disjunction,
		const Expression *	node
	)		const

virtual

Computes the estimated complexity of recursively calculating the activation degree from the given node.

Returns: the estimated complexity of recursively calculating the activation degree from the given node

◆ getExpression()

virtual Expression* fl::Antecedent::getExpression ( ) const

virtual

Gets the expression tree of the antecedent.

Returns: the expression tree of the antecedent

◆ getText()

virtual std::string fl::Antecedent::getText ( ) const

virtual

Gets the antecedent in text.

Returns: the antecedent in text

◆ isLoaded()

virtual bool fl::Antecedent::isLoaded ( ) const

virtual

Indicates whether the antecedent is loaded.

Returns: whether the antecedent is loaded

◆ load() [1/2]

virtual void fl::Antecedent::load ( const Engine * engine )

virtual

Loads the antecedent with the text obtained from Antecedent::getText() and uses the engine to identify and retrieve references to the input variables and output variables as required.

Parameters

engine is the engine from which the rules are part of

◆ load() [2/2]

virtual void fl::Antecedent::load	(	const std::string &	antecedent,
		const Engine *	engine
	)

virtual

Loads the antecedent with the given text and uses the engine to identify and retrieve references to the input variables and output variables as required.

Parameters

antecedent	is the antecedent of the rule in text
engine	is the engine from which the rules are part of

◆ setExpression()

virtual void fl::Antecedent::setExpression ( Expression * expression )

virtual

Sets the expression tree of the antecedent.

Parameters

expression is the expression tree of the antecedent

◆ setText()

virtual void fl::Antecedent::setText ( const std::string & text )

virtual

Sets the antecedent in text.

Parameters

text	is the antecedent in text

◆ toInfix()

virtual std::string fl::Antecedent::toInfix ( const Expression * node = fl::null ) const

virtual

Returns a string represention of the given expression tree utilizing infix notation.

Parameters

node	is a node in the expression tree of the antecedent

Returns: a string represention of the given expression tree utilizing infix notation

◆ toPostfix()

virtual std::string fl::Antecedent::toPostfix ( const Expression * node = fl::null ) const

virtual

Returns a string represention of the given expression tree utilizing postfix notation.

Parameters

node	is a node in the expression tree of the antecedent

Returns: a string represention of the given expression tree utilizing postfix notation

◆ toPrefix()

virtual std::string fl::Antecedent::toPrefix ( const Expression * node = fl::null ) const

virtual

Returns a string represention of the given expression tree utilizing prefix notation.

Parameters

node	is a node in the expression tree of the antecedent

Returns: a string represention of the given expression tree utilizing prefix notation

◆ toString()

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

virtual

Returns a string representation of the expression tree in infix notation.

Returns: a string representation of the expression tree in infix notation

◆ unload()

virtual void fl::Antecedent::unload ( )

virtual

Unloads the antecedent.

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

fuzzylite/fl/rule/Antecedent.h

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ Antecedent()

◆ ~Antecedent()

Member Function Documentation

◆ activationDegree() [1/2]

◆ activationDegree() [2/2]

◆ complexity() [1/2]

◆ complexity() [2/2]

◆ getExpression()

◆ getText()

◆ isLoaded()

◆ load() [1/2]

◆ load() [2/2]

◆ setExpression()

◆ setText()

◆ toInfix()

◆ toPostfix()

◆ toPrefix()

◆ toString()

◆ unload()