about fitness function gatool

Hello! I have a fitness function

      function z = my_fun(x)
      Visot1 = readfis('Visot1'); %read fis-file to workspace
      Visot1.input(1,1).mf(1,1).params=[x(1),x(2),x(3)]; %rewrite params of fis-file
      sim('sfundebug.mdl'); %simulate a simulink model, which use fis-file and write to workspace "simout.signals.values"
      z = sqrt(sum((simout.signals.values).^2)/(length(simout.signals.values)));

But then I use it, I have an error "Error due to multiple causes." When I do 'dbstop if error', it stop at sim('sfundebug.mdl'); and simulate don't work. If I do Visot1 = readfis('Visot1'); in command line before use gatool, sim('sfundebug.mdl'); is work, but it use the old params of Visot1. Do not rewrite params of fis-file... Do not understand... Thanks for any answer :) Natalia

Answer 1

[Egor]

Hi! Have you solved this problem? Any hints?

Answer 2

[john]

I have same problem but fortunately problem Solved! :D I used below commands instead of sim() command :

 opt = simset('solver','ode45','SrcWorkspace','Current');
[tout,xout,yout] = sim('YourModelName',[0 20],opt);

also you should add some 'outport' to your model in order to save their values during the optimization for calculating Objective Function. you can find more information about this on page 36 (1-20) of below link:

http://seweb.se.wtb.tue.nl/education/4J530/files/optim_tb.pdf

I'll hope it works for you either good luck