Optimization with fmincon: Error==> initVals.f = feval(funf​cn{3},X,va​rargin{:})​;

Hi I'm trying to execute an optimization program but i keep getting this error:

" 
 Error in ==> fmincon at 540
      initVals.f = feval(funfcn{3},X,varargin{:}); "

I do not understand what does it mean. Is someone ready to help me?

My program is:

   function [Apv, Awt, Ah] = minimum_cost
    hybrid_simulator_multi
    design0 = [10 10 200];
    ndcdc=0.95;
    nacdc=0.95;
    ndis=1;
    nch=0.85;
    ninv=0.95;
    nwr=0.98;
    load data_2010_45_175;
    Vwind=data_2010(:,2);
    Ir=data_2010(:,1);
    Ta=data_2010(:,3);
    Pload=data_2010(:,4);
    yout=[];
    designold=[];
  opt = simset('SrcWorkspace','Current');
  [tout,xout,yout] = sim('hybrid_simulator_multi',[],opt);
    options = optimset('fmincon');
    options=optimset(options,'Display','iter','TolX',0.001,'TolFun',0.001);
    options=optimset(options,'Algorithm','sqp'); 
    design = fmincon(@trackmmobj,design0,[],[],[],[],[6 6 150],[15 12 300],@trackmmcon,options);
    Apv = design(1); Awt = design(2); Ah = design(3);
          function F = trackmmobj(design)
              F(1) = yout(1,1);        
          end
          function [c,ceq] = trackmmcon(design)
               c =yout(end,3)-5;  
               ceq=[];
          end
      end

Thank you for your help!

Answer 1

[Alan Weiss]

I do not understand how you are trying to optimize your simulation. Your objective function file, if I understand correctly, is:

 function F = trackmmobj(design)
     F(1) = yout(1,1);        
 end

How is this function supposed to take a value of design and evaluate it? I have the same question about your nonlinear constraint function.

Alan Weiss

MATLAB mathematical toolbox documentation