slifis::FUZZYVAL Class Reference

A class for a fuzzy value [0-1]. More...

#include <fuzzytype.hpp>

List of all members.

Public Member Functions
	FUZZYVAL ()
	FUZZYVAL (double v)
FUZZYVAL &	operator= (const double &v)
	Assignment operator from double (does truncating)
bool	operator== (const double &v) const
	Equality operator for double.
FUZZYVAL	Complement (const FUZZYVAL &f_in)
	Complement operator.
	operator double () const
	Used to convert automatically to a double.
bool	IsZero () const
bool	IsOne () const
Private Attributes
double	_y
	The fuzzy value.
Friends
std::ostream &	operator<< (std::ostream &Stream, const FUZZYVAL &obj)
	The << operator must be defined as a friend function, see .cpp file.

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Detailed Description

A class for a fuzzy value [0-1].

• This class holds a single 'double' value, but it's value is guaranteed to remain in the range [0-1]

• All common operators are defined, and cast to 'double' is provided.

• Two functions are provided ( IsOne() and IsZero() ) for comparing to 1 and 0. These handle the needed thresholds so you don't have to write complicated tests such as

                  if( 1. - MyFuzzyValue > Threshold )
                          DoThis();
  

  Instead, you can write:

                  if( MyFuzzyValue.IsOne() )
                          DoThis();
  

  The threshold is an absolute value (SLIFIS_EPSILON_FUZZY). While this is usually not recommended when using general floating-point values, it is ok in this case, as the range is constrained.

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Constructor & Destructor Documentation

slifis::FUZZYVAL::FUZZYVAL

(

)

[inline]

References _y.

Referenced by Complement().

slifis::FUZZYVAL::FUZZYVAL

(

double

v

)

[inline]

References _y.

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Member Function Documentation

FUZZYVAL& slifis::FUZZYVAL::operator=

(

const double &

v

)

[inline]

Assignment operator from double (does truncating)

References _y.

bool slifis::FUZZYVAL::operator==

(

const double &

v

)

const [inline]

Equality operator for double.

References _y, and SLIFIS_EPSILON_FUZZY.

FUZZYVAL slifis::FUZZYVAL::Complement

(

const FUZZYVAL &

f_in

)

[inline]

Complement operator.

References _y, and FUZZYVAL().

slifis::FUZZYVAL::operator double

(

)

const [inline]

Used to convert automatically to a double.

References _y.

bool slifis::FUZZYVAL::IsZero

(

)

const [inline]

References _y, and SLIFIS_EPSILON_FUZZY.

Referenced by slifis_plot::PLOT_FS::DrawValue(), slifis::FUZZY_ROOT::FindBestMf(), slifis::SLIFIS::P_Evaluate_TS(), slifis::RULE_BASE::P_FindBestMf(), slifis::MEMBFUNC::Scale(), and slifis::MEMBFUNC::Truncate().

bool slifis::FUZZYVAL::IsOne

(

)

const [inline]

References _y, and SLIFIS_EPSILON_FUZZY.

Referenced by slifis::FUZZY_ROOT::IsNormalised(), slifis::MEMBFUNC::Scale(), and slifis::MEMBFUNC::Truncate().

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Friends And Related Function Documentation

std::ostream& operator<<	(	std::ostream &	Stream,
		const FUZZYVAL &	obj
	)		[friend]

The << operator must be defined as a friend function, see .cpp file.

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Member Data Documentation

double slifis::FUZZYVAL::_y [private]

The fuzzy value.

Referenced by Complement(), FUZZYVAL(), IsOne(), IsZero(), operator double(), operator=(), and operator==().