"Index exceeds matrix dimensions" error when running Fuzzy Inference Engine

Hello I have a fuzzy engine, just one input with 4 membership functions and 4 outputs using sugeno type, the result with constant type between [0 10]. I added 4 rules and when i run the engine the error occured index exceeds matrix dimensions. How can i solve this problem.

I have Matlab R2011b

Many Thanks

Answer 1

[Sam Chak]

The error message likely arises from specifying the membership function parameters as a vector of length two, [0, 10]. However, the parameter of a 'constant'-type singleton membership function must be scalar, as demonstrated in the example below.

%% Fuzzy System
fis = sugfis;

% Fuzzy Input 1
fis = addInput(fis, [-1 +1], 'Name', 'x', 'NumMFs', 4, 'MFType', "gaussmf");

% Fuzzy Output
fis = addOutput(fis,  [-1 +1], 'Name', 'y');

% Staircase
fis = addMF(fis, 'y', 'constant', -1.0, 'Name', 'out1');
fis = addMF(fis, 'y', 'constant', -1/3, 'Name', 'out2');
fis = addMF(fis, 'y', 'constant',  1/3, 'Name', 'out3');
fis = addMF(fis, 'y', 'constant',  1.0, 'Name', 'out4');

% Fuzzy Rules
rules = [
    "x==mf1 => y=out1"
    "x==mf2 => y=out2"
    "x==mf3 => y=out3"
    "x==mf4 => y=out4"
    ];
fis = addRule(fis, rules);

figure
plotmf(fis, 'input', 1, 201), grid on, title('Input fuzzy sets')

figure
opt = gensurfOptions('NumGridPoints', 201);
gensurf(fis, opt), title('Fuzzy system output')