fmincon in for loop

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studentU
studentU 2016-10-29
编辑： Matt J 2016-10-30
hello, I am trying to use fmincon inside a for loop such as described in the following code:
for i=1:size(X)
Xd=[X(i);Y(i)];
opts = optimoptions('fmincon','Algorithm','sqp');
f= fmincon(@(x)objfun(x,u,l,c),x0,[],[],[],[]...
,[],[],@(x)confcn(x,u,l,c,Xd),opts);
FF(i)=f;
end
When i fixe Xd, without using for loop, it run greatly. But with for loop, it generate this error:"Subscripted assignment dimension mismatch".
have you some idea to advise me?
  1 个评论
Star Strider
Star Strider 2016-10-29
Yes!
If it runs correctly without the for loop, don’t use the for loop!

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回答（1 个）

Matt J
Matt J 2016-10-30
编辑：Matt J 2016-10-30
it generate this error:"Subscripted assignment dimension mismatch".
You should be giving us more information than this (a copy/paste of the whole error message). MATLAB error messages will tell you specifically which line of code and which command is generating the error.
However, I assume the problem is in this line
FF(i)=f;
If f is a vector, you cannot stick it in a scalar location FF(i). Use FF(i,:) or FF(:,i) or whatever is appropriate to the shape of 'f' and the shape of the FF that you have pre-allocated.

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