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Using the function fmincon

Auryn_ 님이 질문을 제출함. 2 Sep 2019
최근 활동 Auryn_ 님이 댓글을 추가함. 2 Sep 2019
Hi,
I want to optimise a function that I called FUNCTION where
function [Err]=FUNCTION(coef)
data1=...
data2=...
[x1]=Function1(coef, data1, data2); %Function1 is an additional function
% % return the error
Err=1-x1;
end
I have this function FUNCTION and try to minimize Err using fmincon:
Aeq=[1 1 1 1 1 1 1 1 1 1;1 -1 1 -1 1 -1 1 -1 1 -1];
beq=[0;1];
[x] = fmincon (FUNCTION(coef),coef,[],[],Aeq,beq);
I don't know why is not working and gives me an error :
"Error using optimfcnchk (line 101)
FUN must be a function, a valid character vector
expression, or an inline function object.
Error in fmincon (line 409)
funfcn =optimfcnchk(FUN,'fmincon',length(varargin),funValCheck,flags.grad,flags.hess,false,Algorithm); "
I appreciate in advance any help you could provide me!

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Torsten 님의 답변 2 Sep 2019
 채택된 답변

[x] = fmincon (@FUNCTION,coef,[],[],Aeq,beq);

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Thanks!
[x] = fmincon (@(coef)FUNCTION(coef),coef,[],[],Aeq,beq);
Hi again,
could I specify to stop fmincon if the Err is less than a certain value?

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Adam 님의 답변 2 Sep 2019

The first argument needs to be a function handle, not a call to the function, although your function is FUNCTION so I'm not sure what FUN is, but you certainly shouldn't be passing the argument to it.
@FUNCTION
would seem like what you should be passing in.

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표시 이전 댓글 수: 1
Hi again,
could I specify to stop fmincon if the Err is less than a certain value?
Use an output function.
An example to stop fmincon if a certain condition holds is given under
https://de.mathworks.com/help/optim/ug/output-functions.html
Thanks!

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