How to change the Type of MF from trimf to constant in the Fuzzy Logic Designer app?

how to change the Type of the current variable from trimf to constant in "fuzzy logic designer"? Unfortunately, I can't find constant value, although you can add constant value by coding.

Answer 1

[Sam Chak]

Hi @m gh

You can convert the Triangular MFs to Singletons (constant MFs) using this workaround, by specifying all three triMF parameters to have the same values in the Fuzzy Logic Designer app.

fis = mamfis('NumInputs', 1);

%% Triangular MFs (triMFs)
figure
plotmf(fis, 'input', 1), grid on, 
title('Before conversion: Triangular MFs')

%% Convert triMFs to Singletons
fis.Inputs(1).MembershipFunctions(1).Parameters = [0.0 0.0 0.0];
fis.Inputs(1).MembershipFunctions(2).Parameters = [0.5 0.5 0.5];
fis.Inputs(1).MembershipFunctions(3).Parameters = [1.0 1.0 1.0];
figure
plotmf(fis, 'input', 1, 2001), grid on, xlim([-0.2, 1.2])
title('After conversion: Constant MFs')