Fuzzy Logic Toolbox

psigmf

Built-in membership function composed of the product of two sigmoidally-shaped membership functions.

Synopsis

y = psigmf(x,[a1 c1 a2 c2])

Description

The sigmoid curve plotted for the vector x depends on two parameters a and c as given by

psigmf is simply the product of two such curves plotted for the values of the vector x

f₁(x; a1, c₁) * f₂(x; a2, c₂)

The parameters are listed in the order [a1 c₁ a₂ c₂].

Examples

x=0:0.1:10;
y=psigmf(x,[2 3 -5 8]);
plot(x,y)
xlabel('psigmf, P=[2 3 -5 8]')

See Also

dsigmf, gaussmf, gauss2mf, gbellmf, evalmf, mf2mf, pimf, sigmf, smf, trapmf, trimf, zmf

plotmf

readfis