sigmf compute the sigmoidal member function of
x with parameters [a,b].
Examples
x=linspace(0,1,100)';y1=sigmf(x,[120.3]);y2=sigmf(x,[120.5]);y3=sigmf(x,[-120.5]);y4=sigmf(x,[-120.7]);scf();clf();plot2d(x,[y1y2y3y4],leg="y1@y2@y3@y4");xtitle("Sigmoidal Member Function Example","x","mu(x)");