fmincon - Not Enough Input Arguments

Hello,

I am trying to run an optimization with fmincon, with the function defined independently.

x0 = [-1,2];
A = [1,2];
b = 1;

x = fmincon(z1_test,x0,A,b)


function f2 = z1_test(x)
100*(x(2)-x(1)^2)^2 + (1-x(1))^2
end

For whatever reason, I keep on getting the same error message.

But if I were to define the function thusly, I know it works

x0 = [-1,2];
A = [1,2];
b = 1;

z1_test = @(x)100*(x(2)-x(1)^2)^2 + (1-x(1))^2;
x = fmincon(z1_test,x0,A,b)

It is driving me crazy.

Answer 1

[madhan ravi]

x0 = [-1,2];
A = [1,2];
b = 1;
x = fmincon(@z1_test,x0,A,b)
    %       ^------ missed it

function f2 = z1_test(x)
f2 = 100*(x(2)-x(1)^2)^2 + (1-x(1))^2;
%^^--------- forgot to assign output
end

[Al-Baraa El-Hag]

Ah thank you!!!