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Running multiple scripts on separate cores in parallel

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Koren Murphy
Koren Murphy 2022-8-11
评论： Walter Roberson 2022-8-11
I have four scripts - all running a MILP problem using intlinprog. I want to run the four scripts simulataneously to produce their results in the workspace. I cannot run it as parfor problems as there exisits a 'break' in the intlinprog loop.
I have tried :
parpool(4)
parfor K = 1 : 4
if K == 1; test1; end
if K == 2; test2; end
if K == 3; test3; end
if K == 4; test4; end
end
However, it informs me:
Error using test2
Transparency violation error.
See Workspace Transparency in MATLAB Statements.
Error in runCodeScript (line 2)
parfor K = 1 : 2

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采纳的回答

Matt J
Matt J 2022-8-11
fcn=@(i) run("test"+i);
for K=1:n
F(K)=parfeval(fcn,0,K);
end;
wait(F)
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Koren Murphy
Koren Murphy 2022-8-11
Thank you Walter - so I would need to create a vector of the fucntion names to implement as fcn so all 4 run simulanteously on different workers?
Walter Roberson
Walter Roberson 2022-8-11
No,
parfeval(fcn,0,K)
means to ask a worker to execute function fcn on a worker, and on the worker it will be passed the parameter K . Looking at the function source:
fcn=@(i) run("test"+i);
that would take the numeric value passed in, convert it to character vector, append it to test and ask to run() the result. So when parfeval(fcn,0,3) was executed, run("test3") would be executed, thus asking the script test3 to execute.
You would only need a vector (cell array) of function handles if the names of the scripts to execute were not predictable.

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