fmincon/multistart won't debug/display errors in OutputFcn

3 次查看（过去 30 天）
Joel Lynch
Joel Lynch 2022-3-31
回答： Joel Lynch 2022-3-31
If "x=b" is uncommented, the code still runs and does not break on error or display the line number.
This means debugging a more complex fcontrol function is quite difficult. Is there a way to force pause on errors in multistart?
% Fmincon problem
rng default % For reproducibility
opts = optimoptions(@fmincon,'OutputFcn', @fcontrol);
problem = createOptimProblem( 'fmincon','objective', ...
@(x) x.^2 + 4*sin(5*x),'x0',3,'lb',-5,'ub',5,'options',opts);
% Run Problem
[ x, f ] = run(MultiStart( 'Display','iter'),problem,5);
function stop = fcontrol(x, optimValues, state)
stop = false; % default continue
% x=b;
end

请先登录，再回答此问题。

采纳的回答

Joel Lynch
Joel Lynch 2022-3-31
I figured out the issue, 'OutputFcn' must be added in Multistart, not fmincon. This also means using different syntax for the call:
% Fmincon problem
rng default % For reproducibility
opts = optimoptions(@fmincon);
problem = createOptimProblem( 'fmincon','objective', ...
@(x) x.^2 + 4*sin(5*x),'x0',3,'lb',-5,'ub',5,'options',opts);
% Run Problem
ms = MultiStart( 'Display','iter','OutputFcn', @fcontrol);
[ x, f ] = run(ms,problem,5);
function stop = fcontrol(optimValues, state)
x = optimValues.localsolution.X;
stop = false; % default continue
% x=b;
end

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Global or Multiple Starting Point Search 的更多信息

标签

产品


版本

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by