Error using ga (line 283) - Matlab newbie

I am trying to minimize my equation (see fitnessfcn) and to solve it to x.

w = [-2.513, 0.2409, 2.3219];
l = [118, 104, 119];
N = 3;
nvars = 3;
b = 119 ;
fitnessfcn = sum (w(1:N).* ((abs(x-l(1:N)).*abs(x-l(1:N))) .* log(abs(x-l(1:N)))))-b;
[x, fval] = ga(fitnessfcn, nvars)

I am officially frustrated and need help. Thanks in advance!

[KSSV]

We cannot run this as x is not defined here.

Answer 1

[José-Luis]

fitnessfcn should be a function handle. It doesn't look like that's what you are passing.

 fitnessfcn = @(x) x.^2;

For example.