How can I change the 'MaxIterations' option in matlab 'createOptimProblem('fmincon',..........)'

Question

Md. Hasan Rahman 2020-2-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503897-how-can-i-change-the-maxiterations-option-in-matlab-createoptimproblem-fmincon

评论： Matt J 2020-2-6

I am trying to solve a problem using the follwing code:

rng default 
gs = GlobalSearch;
problem = createOptimProblem('fmincon','x0',x0,...
    'objective',objective,'lb',lb,'ub',ub,'nonlcon',constfunc);
[res] = run(gs,problem);

But when I run this, this massage i get in command window:

'''''''''GlobalSearch stopped with one or more of the local solver runs stopping prematurely.

9 out of 9 local solver runs exceeded the iteration limit (problem.options.MaxIterations) or

the function evaluation limit (problem.options.MaxFunctionEvaluations).

None of the 9 local solver runs converged with a positive local solver exit flag"""""

I like to change the default option ""MaxIterations"". And ''MaxFunctionEvaluations''. I tried using the follwoing way but its not working,

rng default 
gs = GlobalSearch;
problem = createOptimProblem('fmincon','x0',x0,...
    'objective',objective,'lb',lb,'ub',ub,'nonlcon',constfunc,'MaxFunctionEvaluations',3000);
[res] = run(gs,problem);

It gives the following error:

"""""No field MaxFunctionEvaluations exists for PROBLEM structure."""""

How can I solve this problem? Thank you for your comment in advance.

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Answer 1

Matt J 2020-2-5

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/503897-how-can-i-change-the-maxiterations-option-in-matlab-createoptimproblem-fmincon#answer_414025

编辑：Matt J 2020-2-5

在 MATLAB Online 中打开

You need to do this,

opts=optimoptions('fmincon', 'MaxFunctionEvaluations',3000);
problem = createOptimProblem('fmincon','x0',x0,...
    'objective',objective,'lb',lb,'ub',ub,'nonlcon',constfunc,'options',opts);