MATLAB: About gatool

fisgaMATLABoptimization

Hello! I have a fitness functiion:
 function z = my_fun(x)  
 Skorost8.input(1,1).mf(1,1).params=[x(1),x(2),x(3)];
 Skorost8.input(1,1).mf(1,2).params=[x(4),x(5),x(6)];
 Skorost8.input(1,1).mf(1,3).params=[x(7),x(8),x(9)];
 Skorost8.input(1,1).mf(1,4).params=[x(10),x(11),x(12)];
 Skorost8.input(1,2).mf(1,1).params=[x(13),x(14),x(15)];
 Skorost8.input(1,2).mf(1,2).params=[x(16),x(17),x(18)];
 Skorost8.input(1,2).mf(1,3).params=[x(19),x(20),x(21)];
 load_system('petina.mdl');
 sim('petina.mdl');
 close_system('petina.mdl');
 z=simout.signals.values;
And petina.mdl file, which it use. The mdl-file write to workspace a massive of values, which must be a minimal (z=simout.signals.values;)
When I try to use it with gatool I get:
 >> x=ga(@my_fun,21);
  ??? Subscripted assignment dimension mismatch.
Error in ==> fcnvectorizer at 14
            y(i,:) = feval(fun,(pop(i,:)));
Error in ==> makeState at 47
        Score =
        fcnvectorizer(state.Population(initScoreProvided+1:end,:),FitnessFcn,1,options.SerialUserFcn);
Error in ==> gaunc at 41
state = makeState(GenomeLength,FitnessFcn,Iterate,output.problemtype,options);
Error in ==> ga at 279
        [x,fval,exitFlag,output,population,scores] = gaunc(FitnessFcn,nvars, ...
Caused by:
    Failure in user-supplied fitness function evaluation. GA cannot continue.
How to use correctly gatool in this case? thank you very much!

Best Answer

dbstop if error
Which will stop deep inside of ga(). Now put a break point in first line of your objective function. Run the feval line that causes the error and step through your fitness function to find the error and analyze the inputs.
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