(par)for k=1:N end; select for or parfor loop without code replication

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Simon
Simon 2023-8-23
评论： Simon 2023-8-24
I like to use for-loop or parfor-loop with function input flag. One way to do that is using if-else with code replication. I wonder is there a cleverer way?
% solution based on code replication
function foo(parflag)
if parflg==true
parfor k=1:3
% processing codes
end
else
for k=1:3
% copy of processing codes
end
end
end
%% wondering how to make this idea work?
function hoo(parflag)
if parflag==true
forString = str2func('parfor')
else
forString = str2func('for')
end
forString k=1:3
% processing codes
end
end

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采纳的回答

Matt J
Matt J 2023-8-23
编辑：Matt J 2023-8-23
You can avoid replicating the loop code as follows.
numWorkers={}; % or whatever
if ~parflag
numWorkers={0};
end
parfor (k=1:3, numWorkers{:})
% processing codes
end
Be mindful, though, that parfor loops have stronger requirements on the code structure, and you would be limiting yourself to that, even when running serially.
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Simon
Simon 2023-8-24
Yes, that flexibility works for me. For example, when I am not doing anything but programming Matlab, I can set it to the maximum number of workers my compouter has. But when I heavily multitask, I can set numWorkers, say, 2 or 3, and let other cores to work on non-Matlab tasks. (I guess that's how my Mac would work.)

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