functionsigmf - Sigmoidal member function
sigmf compute the sigmoidal member function of x with parameters [a,b] .
The sigmf function is defined by:

x=linspace(0,1,100)';
y1=sigmf(x,[12 0.3]);
y2=sigmf(x,[12 0.5]);
y3=sigmf(x,[-12 0.5]);
y4=sigmf(x,[-12 0.7]);
xbasc();
plot2d(x,[y1 y2 y3 y4],leg="y1@y2@y3@y4");
xtitle("Sigmoidal Member Function Example","x","mu(x)");
Jaime Urzua Grez