autopas::FuzzyLogic::FuzzySet Class Reference

Used to represent a mathematical Fuzzy-Set. More...

#include <FuzzySet.h>

Public Types
using	Data = std::map< std::string, double >
	A map of the form {dimension_name: value}.
using	ComposedMembershipFunction = std::function< double(const Data &)>
	A composed membership function is a membership function that relies on different FuzzySets to calculate the membership value.
using	BaseMembershipFunction = std::tuple< std::string, std::vector< double >, std::function< double(double)> >
	A base membership function calculates the membership value based on a direct function evaluation.

Public Member Functions
	FuzzySet (std::string linguisticTerm, BaseMembershipFunction &&baseMembershipFunction)
	Constructs a FuzzySet with a given linguistic term and base membership function.
	FuzzySet (std::string linguisticTerm, ComposedMembershipFunction &&membershipFunction, const std::shared_ptr< CrispSet > &crispSet)
	Constructs a FuzzySet with a given linguistic term, composed membership function and crisp set.
double	evaluate_membership (const Data &data) const
	Evaluates the membership function of this FuzzySet at the given value.
double	defuzzify (DefuzzificationMethodOption method, size_t numSamples) const
	Defuzzifies the FuzzySet using the given data and method.
std::string	printBaseMembershipFunction () const
	Returns a string representation of the BaseMembershipFunction.
	operator std::string () const
	Returns a string representation of the FuzzySet.
const std::string &	getLinguisticTerm () const
	Returns the linguistic term of the FuzzySet.
const std::shared_ptr< CrispSet > &	getCrispSet () const
	Returns the crisp set of the FuzzySet.
void	setCrispSet (const std::shared_ptr< CrispSet > &crispSet)
	Sets the crisp set of the FuzzySet.

Friends
std::shared_ptr< FuzzySet >	operator|| (const std::shared_ptr< FuzzySet > &lhs, const std::shared_ptr< FuzzySet > &rhs)
	Make the Union Operator a friend of the class.
std::shared_ptr< FuzzySet >	operator&& (const std::shared_ptr< FuzzySet > &lhs, const std::shared_ptr< FuzzySet > &rhs)
	Make the Intersection Operator a friend of the class.
std::shared_ptr< FuzzySet >	operator! (const std::shared_ptr< FuzzySet > &fuzzySet)
	Make the Complement Operator a friend of the class.

Detailed Description

Used to represent a mathematical Fuzzy-Set.

Member Typedef Documentation

BaseMembershipFunction

using autopas::FuzzyLogic::FuzzySet::BaseMembershipFunction = std::tuple<std::string, std::vector<double>, std::function<double(double)> >

A base membership function calculates the membership value based on a direct function evaluation.

Base membership function take a single value and returns the corresponding membership value. (m=f(x)) Additionally, the base membership function stores information about the membership function and its parameters.

ComposedMembershipFunction

using autopas::FuzzyLogic::FuzzySet::ComposedMembershipFunction = std::function<double(const Data &)>

A composed membership function is a membership function that relies on different FuzzySets to calculate the membership value.

This is important as it allows for straightforward implementation of fuzzy logic operators. Composed membership represent higher dimensional membership functions (m=f(x1,x2,...,xn)). The necessary data is passed as a map of the form {dimension_name: value}.

Data

using autopas::FuzzyLogic::FuzzySet::Data = std::map<std::string, double>

A map of the form {dimension_name: value}.

Used to represent higher dimensional function inputs.

Constructor & Destructor Documentation

FuzzySet() [1/2]

autopas::FuzzyLogic::FuzzySet::FuzzySet	(	std::string	linguisticTerm,
		BaseMembershipFunction &&	baseMembershipFunction
	)

Constructs a FuzzySet with a given linguistic term and base membership function.

Parameters

linguisticTerm
baseMembershipFunction

FuzzySet() [2/2]

autopas::FuzzyLogic::FuzzySet::FuzzySet	(	std::string	linguisticTerm,
		ComposedMembershipFunction &&	membershipFunction,
		const std::shared_ptr< CrispSet > &	crispSet
	)

Constructs a FuzzySet with a given linguistic term, composed membership function and crisp set.

Parameters

linguisticTerm
membershipFunction
crispSet

Member Function Documentation

defuzzify()

double autopas::FuzzyLogic::FuzzySet::defuzzify	(	DefuzzificationMethodOption	method,
		size_t	numSamples
	)		const

Defuzzifies the FuzzySet using the given data and method.

Parameters

method	The defuzzification method to use.
numSamples	The number of samples to use for the numerical defuzzification.

Returns

The defuzzified value of this FuzzySet.

evaluate_membership()

double autopas::FuzzyLogic::FuzzySet::evaluate_membership

(

const Data &

data

)

const

Evaluates the membership function of this FuzzySet at the given value.

Parameters

data	A map of the form {dimension_name: value}.

Returns

The membership value of the given value in this FuzzySet.

getCrispSet()

const std::shared_ptr< CrispSet > & autopas::FuzzyLogic::FuzzySet::getCrispSet

(

)

const

Returns the crisp set of the FuzzySet.

Returns

The crisp set of the FuzzySet.

getLinguisticTerm()

const std::string & autopas::FuzzyLogic::FuzzySet::getLinguisticTerm

(

)

const

Returns the linguistic term of the FuzzySet.

Returns

The linguistic term of the FuzzySet.

printBaseMembershipFunction()

std::string autopas::FuzzyLogic::FuzzySet::printBaseMembershipFunction

(

)

const

Returns a string representation of the BaseMembershipFunction.

Returns

A string representation of the BaseMembershipFunction.

setCrispSet()

void autopas::FuzzyLogic::FuzzySet::setCrispSet

(

const std::shared_ptr< CrispSet > &

crispSet

)

Sets the crisp set of the FuzzySet.

Parameters

crispSet

Friends And Related Symbol Documentation

operator!

std::shared_ptr< FuzzySet > operator! ( const std::shared_ptr< FuzzySet > &  fuzzySet )

friend

Make the Complement Operator a friend of the class.

Parameters

fuzzySet

Returns

The complement of fuzzySet.

operator&&

std::shared_ptr< FuzzySet > operator&& ( const std::shared_ptr< FuzzySet > &  lhs, const std::shared_ptr< FuzzySet > &  rhs  )

friend

Make the Intersection Operator a friend of the class.

Parameters

lhs
rhs

Returns

The intersection of lhs and rhs.

operator||

std::shared_ptr< FuzzySet > operator|| ( const std::shared_ptr< FuzzySet > &  lhs, const std::shared_ptr< FuzzySet > &  rhs  )

friend

Make the Union Operator a friend of the class.

Parameters

lhs
rhs

Returns

The union of lhs and rhs.

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

• autopas/tuning/tuningStrategy/fuzzyTuning/fuzzyController/FuzzySet.h
• autopas/tuning/tuningStrategy/fuzzyTuning/fuzzyController/FuzzySet.cpp