The "run" command does not work in GARDER.
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A script using Multi Start to search for a global minimum works in MATLAB, but an error appears in GARDER:
Error: You may not use the command(s) run in your code
Why does this happen, and how can you prevent it?
kol101=@(x)x.^2+2*sin(x.^2)+exp(-x);
opts = optimoptions(@fmincon,'Algorithm','sqp');
problem = createOptimProblem('fmincon','objective',...
kol101,'x0',3,'lb',1.2,'ub',4.8,'options',opts);
ms = MultiStart;
[xmin,fmin,flaga] = run(ms,problem,20)
fplot(kol101,[1.2,4.8])
hold on
plot(xmin,fmin,'rp')
采纳的回答
I assume you are refering to MATLAB Grader. Certain commands and functions are not allowed when running code in MATLAB Grader, including run. However, the aim was likley to prevent use of the run function, which would allow users to circumvent restrictions an instructor places on solving a problem.
Ok, that's the why. In your case, you are not using the (very overlaoded) run function. Instead, you are calling an object function of MultiStart. That provides the workaround you need to use MultiStart in Grader. There are two ways to invoke a method (a.k.a. object function), which you can read about here.
- obj.methodName(arg)
- methodName(obj,arg)
Use the first syntax with dot notation, and the code will run in Grader
kol101=@(x)x.^2+2*sin(x.^2)+exp(-x);
opts = optimoptions(@fmincon,'Algorithm','sqp');
problem = createOptimProblem('fmincon','objective',...
kol101,'x0',3,'lb',1.2,'ub',4.8,'options',opts);
ms = MultiStart;
[xmin,fmin,flaga] = ms.run(problem,20)
fplot(kol101,[1.2,4.8])
hold on
plot(xmin,fmin,'rp')
2 个评论
Zbigniew Garncarek
2024-2-20
Piotr Kot
2024-12-20
Cris LaPierre wrote:
"Certain commands and functions are not allowed when running code in MATLAB Grader, including run"
But unfortunately, that's not true
Just take a look at the thread
or
Currently, any Matlab command, including system or run, can be run, and the method described in these threads is acceptable by administrators!!!
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