error running optimisation while running ga toolbox

fitness function must return a scalar value function [sol, val] = fitness(sol,options)

global harm_n

M=sol;

N=4096; %N is a power of 2

kk=max(size(sol))-1;

V=125*ones(1,kk);

[fftvao v]=modulation(N,M,V);

vv=abs(fftvao(2));

sumh=0;

for g=1:harm_n

h5=abs((fftvao(6*g+1+1))); %(6n+1)th harmonic

h7=abs((fftvao(6*g-1+1))); %(6n-1)th harmonic

sumh=sumh+h5+h7;

end

val=-100*(sumh)/vv;

[Alan Weiss]

Please mark your code with the {} Code button to make it more readable. Please include your ga call, something like

x = ga(@(sol)fitness(sol,fitness),3)

Then please copy and paste the full, entire error message into your question. That way we might have a chance to understand what is going on and maybe even help.

Alan Weiss

MATLAB mathematical toolbox documentation