Reply To: Converting Matlab .fis file to C code

[Unknown]

Hi, I’m new from here and frist thank to Juan for fuzzylite it is great job.

I’m working in a example that could help you but I have a problem to defuzzify the output variable.

1) I’m ussing fuzzylite 5.0 (C++).
2) I have a fis file (created with octave), called fuzzy.fis.

[System]
Name='Direccion-Controlador'
Type='mamdani'
Version=1.0
NumInputs=2
NumOutputs=1
NumRules=6
AndMethod='min'
OrMethod='max'
ImpMethod='min'
AggMethod='max'
DefuzzMethod='centroid'

[Input1]
Name='Error'
Range=[-64 64]
NumMFs=3
MF1='Izquierda':'gaussmf',[35 -64]
MF2='Centro':'gaussmf',[25 0]
MF3='Derecha':'gaussmf',[35 64]

[Input2]
Name='D-Error'
Range=[-1 1]
NumMFs=2
MF1='Negativo':'gaussmf',[1 -1]
MF2='Positivo':'gaussmf',[1 1]

[Output1]
Name='Angulo'
Range=[-45 45]
NumMFs=5
MF1='M-izq':'trapmf',[-46 -45 -30 -15]
MF2='Izq':'trimf',[-30 -15 0]
MF3='Centro':'trimf',[-15 0 15]
MF4='Der':'trimf',[0 15 30]
MF5='M-der':'trapmf',[15 30 45 46]

[Rules]
1 1, 2 (1) : 1
1 2, 1 (1) : 1
2 1, 3 (1) : 1
2 2, 3 (1) : 1
3 1, 5 (1) : 1
3 2, 4 (1) : 1

3) I want to evaluate some input values.

#include <fl/Headers.h>
#include <sstream>
#include <stdio.h>

int main(int argc, char **argv)
{
    fl::Engine* engine = fl::FisImporter().fromFile("/home/ruben/fuzzy.fis");
	
    engine->getInputVariable(0)->setInputValue(15);
    engine->getInputVariable(1)->setInputValue(0.32);

    engine->process();

    //engine->defuzzify();

    fl::OutputVariable* output = engine->getOutputVariable("Angulo");
    
    FL_LOG(output->toString());

    FL_LOG(output->fuzzyOutputValue());
    
    FL_LOG(output->fuzzify(output->getOutputValue()));

}

I have been seaching and trying with different ways but I can’t get the crisp output’s value in float format.

ejemplo.cpp [19]:0.078/Mizq + 0.078/Izq + 0.794/Centro + 0.375/Der + 0.375/Mder
ejemplo.cpp [21]:0.000/Mizq + 0.000/Izq + 0.357/Centro + 0.643/Der + 0.000/Mder
ejemplo.cpp [24]:OutputVariable: Angulo
enabled: true
range: -45.000 45.000
accumulation: Maximum
defuzzifier: Centroid 200
default: nan
lock-previous: false
lock-range: false
term: Mizq Trapezoid -46.000 -45.000 -30.000 -15.000
term: Izq Triangle -30.000 -15.000 0.000
term: Centro Triangle -15.000 0.000 15.000
term: Der Triangle 0.000 15.000 30.000
term: Mder Trapezoid 15.000 30.000 45.000 46.000

If I include the line “engine->defuzzify();” I get error’s compiler message:

error: ‘class fl::Engine’ has no member named ‘defuzzify’
engine->defuzzify();

when I run the fuzzy system in octave with 15 and 0.32, ( evalfis([15,0.32],fis) ) I get 9.6498.

Juan, could you help me?

Thank.