FLT::System Class Reference

This class contains methods and attributes common to fuzzy Systems. More...

#include <system.hpp>

Collaboration diagram for FLT::System:

Public Member Functions
size_t	inputs (void) const
	Returns the number of inputs of the System.
size_t	outputs (void) const
	Returns the number of outputs of the System.
size_t	rules (size_t output) const
	Returns the number of rules for the output output of the System.
TNT::Array1D< size_t >	rules (void) const
	Returns the number of rules for each output of the System.
TNT::Array1D< double >	in_low (void) const
	Returns the low limits of the System inputs.
double	in_low (size_t input) const
	Returns the low limit of the input input.
TNT::Array1D< double >	in_high (void) const
	Returns the high limits of the System inputs.
double	in_high (size_t input) const
	Returns the high limit of the input input.
TNT::Array1D< double >	out_low (void) const
	Returns the low limits of the System outputs.
double	out_low (size_t output) const
	Returns the low limit of the output output.
TNT::Array1D< double >	out_high (void) const
	Returns the high limits of the System outputs.
double	out_high (size_t output) const
	Returns the high limit of the output output.
void	in_low (double *limits)
	Changes the low limits of the System inputs.
void	in_high (double *limits)
	Changes the high limits of the System inputs.
void	out_low (double *limits)
	Changes the low limits of the System outputs.
void	out_high (double *limits)
	Changes the high limits of the System outputs.
int	checkInputLimits (const double *const point)
	Checks if point meets the input limits of the system. More...
int	checkOutputLimits (const double *const output)
	Checks if output meets the output limits of the system. More...
int	test (void) const
	This function checks the parameters of all Membership functions of the System, and corrects them if possible. More...
int	changeRule (const Rule &R, size_t r, size_t output)
	Changes a Rule in the System. More...
int	readRule (Rule &R, size_t output, size_t r) const
	Reads a Rule from the System. More...
Rule *	readRule (size_t output, size_t r)
	Extracts a pointer to a Rule from the System. More...
void	initialize (size_t in, size_t out, size_t *N)
	Initializes the System with in inputs, out outputs and N[out] rules for each output.
size_t	NumberOfAntecedents (void)
	Gets the number of parameters stored in the antecedents of the System.
int	setAntecedents (const double *const parameters)
	Sets all the parameters of the antecedents of the System. More...
TNT::Array1D< double >	getAntecedents (void)
	Gets all the parameters of the antecedents of the System. More...
size_t	NumberOfConsequents (void)
	Gets the number of parameters stored in the consequents of the System.
void	setConsequents (const double *const parameters)
	Sets all the consequets of the System. More...
TNT::Array1D< double >	getConsequents (void)
	Gets the consequets of the System. More...
TNT::Array1D< double >	evaluate (const double *const point)
	Evaluates the System for input point. More...
System &	operator= (const System &S)
	System (const System &S)
	System (size_t in, size_t out, size_t *N)

Private Attributes
size_t	in
	Number of inputs of the System.
size_t	out
	Number of outputs of the System.
size_t *	N
	Number of rules of the System for each output.
double *	low_in
	Low limits for the inputs of the System.
double *	low_out
	Low limits for the outputs of the System.
double *	high_in
	High limits for the inputs of the System.
double *	high_out
	High limits for outputs of the System.
Rule **	R
	System Rules.

Detailed Description

This class contains methods and attributes common to fuzzy Systems.

This class stores a completely general Takagi-Sugeno fuzzy System.

See also

For Template Numerical Toolkit (TNT) documentation see http://math.nist.gov/tnt

Examples:

example.cpp, matlab_utilities/activation.cpp, matlab_utilities/antec2mat.cpp, matlab_utilities/aproxjac.cpp, matlab_utilities/aproxlinear.cpp, matlab_utilities/conseq2mat.cpp, matlab_utilities/extractPoints.cpp, matlab_utilities/fis2txt.cpp, matlab_utilities/fuz2mat.cpp, matlab_utilities/fuzcomb.cpp, matlab_utilities/fuzderaffine.cpp, matlab_utilities/fuzderantec.cpp, matlab_utilities/fuzderconseq.cpp, matlab_utilities/fuzderparam.cpp, matlab_utilities/fuzeval.cpp, matlab_utilities/fuzjac.cpp, matlab_utilities/fuzlinear.cpp, matlab_utilities/fuzprint.cpp, matlab_utilities/fuzsubsystem.cpp, matlab_utilities/initializeController.cpp, matlab_utilities/Kalmanantec.cpp, matlab_utilities/Kalmanconseq.cpp, matlab_utilities/Kalmanfuz.cpp, matlab_utilities/mat2antec.cpp, matlab_utilities/mat2conseq.cpp, matlab_utilities/mat2fuz.cpp, and matlab_utilities/txt2fis.cpp.

Member Function Documentation

int System::changeRule	(	const Rule &	R,
		size_t	r,
		size_t	output
	)

Changes a Rule in the System.

Returns

Returns 0 if no errors.
An error means that the rule or the output indicated are beyond the limits of the system.

int System::checkInputLimits

(

const double *const

point

)

Checks if point meets the input limits of the system.

Returns

Returns 0 if low_in[i] <= point[i] <= high_in[i], for i = 1..in.
If point[i] < low_in[i] or point[i] > high_in[i], returns 1 + the lowest value of i that breaks limits.

int System::checkOutputLimits

(

const double *const

output

)

Checks if output meets the output limits of the system.

Returns

Returns 0 if low_out[j] <= output[j] <= high_out[j], for i = j..out.
If output[j] < low_out[j] or output[j] > high_out[j], returns 1 + the lowest value of j that breaks limits.

Array1D< double > System::evaluate

(

const double *const

point

)

Evaluates the System for input point.

If point or output are beyond the limits of the system, a warning message is sent to the standard error stream.

Examples:

matlab_utilities/fuzeval.cpp.

Array1D< double > System::getAntecedents

(

void

)

Gets all the parameters of the antecedents of the System.

The antecedents must be sorted for each output, for each rule.

Examples:

matlab_utilities/antec2mat.cpp, and matlab_utilities/fuz2mat.cpp.

Array1D< double > System::getConsequents

(

void

)

Gets the consequets of the System.

The consequets are sorted for each output, for each rule, the affine term and the consequents of each input.

Examples:

matlab_utilities/conseq2mat.cpp, and matlab_utilities/fuz2mat.cpp.

int System::readRule	(	Rule &	R,
		size_t	output,
		size_t	r
	)		const

Reads a Rule from the System.

Returns

Returns 0 if no errors.
An error means that the rule or the output indicated are beyond the limits of the system.

Examples:

matlab_utilities/activation.cpp, matlab_utilities/antec2mat.cpp, matlab_utilities/conseq2mat.cpp, matlab_utilities/fuz2mat.cpp, matlab_utilities/fuzcomb.cpp, matlab_utilities/fuzderantec.cpp, matlab_utilities/mat2antec.cpp, matlab_utilities/mat2conseq.cpp, and matlab_utilities/mat2fuz.cpp.

Rule * System::readRule	(	size_t	output,
		size_t	r
	)

Extracts a pointer to a Rule from the System.

Returns

Returns NULL if the rule or the output indicated are beyond the limits of the system.

int System::setAntecedents

(

const double *const

parameters

)

Sets all the parameters of the antecedents of the System.

The antecedents must be sorted for each output, for each rule.

Returns

Returns the result of running the System::test() method.

Examples:

matlab_utilities/mat2antec.cpp, and matlab_utilities/mat2fuz.cpp.

void System::setConsequents

(

const double *const

parameters

)

Sets all the consequets of the System.

The consequets must be sorted for each output, for each rule, the affine term and the consequents of each input.

Examples:

matlab_utilities/mat2conseq.cpp, and matlab_utilities/mat2fuz.cpp.

int System::test

(

void

)

const

This function checks the parameters of all Membership functions of the System, and corrects them if possible.

Returns

Returns 0 if no errors, 1 if an error occurs, and -1 if the parameters were corrected.

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

• system.hpp
• system.cpp