Error "Supplied objective function must return a scalar value."

Hi,I am trying to minimize a function,but shows an error,

Error using fmincon (line 641)

Supplied objective function must return a scalar value.

Error in program23 (line 56)

[a,fv] = fmincon(f,X0,[],[],[],[],[3 3],[8 8])

Can someone explain me why? Please help me to correct this code.

Thanks in advance

Answer 1

[Torsten]

The function you pass to fmincon returns a vector of values, not a scalar.

Maybe you mean

f=@(a) norm(sum(((a(1).*(G(x,:)+m)+a(2).*(G(y,:)+p)+gb*(H(x,:)./(a(1)))+gb*(H(y,:)./(a(2)))))));

or something similar.