Using timer, How can I cleanly exit a function execution, when the timer fires in MATLAB?
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taima zoabi
le 13 Déc 2019
Commenté : Walter Roberson
le 3 Mar 2021
My problem is that I can't find a Function to callback as a 'TimerFcn', that cleanly exits my function without errors.
t = timer('StartDelay',2,'TimerFcn', );
Thanks in advance.
2 commentaires
Guillaume
le 13 Déc 2019
Can you explain more clearly what you're trying to do exactly, particularly, the order of execution of the various things you want to happen.
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Walter Roberson
le 13 Déc 2019
Modifié(e) : Walter Roberson
le 21 Déc 2019
There are only four ways in MATLAB to force a function to stop executing without its cooperation:
- quit MATLAB
- force an out-of-memory error
- force an infinite recursion
- Use jave robot or similar to simulate pressing control-C in the command line (note: this might not terminate immediately
There is no way to send a signal to a particular function to force that one function to stop, and there is no way to send a signal to a particular function to force that one function to error().
Therefore what you should do is write your timer to set a flag in an area that the other code checks periodically.
4 commentaires
Walter Roberson
le 3 Mar 2021
I just tried in R2020b, and found that MATLAB:pmaxsize (too much memory) and MATLAB:lang:StackOverflow (too many levels of recursion) can both be caught. However, it would be worth testing out what happens when the problem is triggered in a callback that is not really part of the code being executed.
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Sean de Wolski
le 13 Déc 2019
Why use a timer for this?
In the start of your function, start a tic
t = tic
Then periodically check
if toc(t)>2
return
end
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