Stop an infinit function that is running in parallel with the remaining code, and get the outputs

Question

Thomas Charpentier 2022-12-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1878867-stop-an-infinit-function-that-is-running-in-parallel-with-the-remaining-code-and-get-the-outputs

回答： Alvaro 2023-1-23

Hello everyone,

I am looking for a way to retrieve the output of a function that is running in parallel (with the function parfeval for example) and that can run indefinitely if we don't stop it in the remaining code.

For example : This could be the function :

function a = infinit()
    go = true ;
    while go 
        a = 1 ; 
    end 
end

and this is the code :

parpool(1) ; 
f = parfeval(@infinit,1) ; 
% looking for the code line that can stop the function,  
value = fetchOutputs(f) ; 

I know that "cancel" can actually stop, but then we can't get the output. I have also tryed by using a global variable, or a public variable with app designer, but both of those way are not working. From my research so far, it seems there is no solution. But still I hope that someone has maybe found an idea ! ;)

Otherwise, I actually want to run a function in app designer that is reading data from a sensor periodically. Meanwhile the code is doing something else until the user has finished the experiment. Then I want to get the data from the function. I guess maybe there might be a workaround ?

I thank you all in advance for your help !

Thomas