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Can we use 'parfor' in user defined function?

Asked by Mohsin Shah on 6 Aug 2017
Latest activity Commented on by Mohsin Shah on 7 Aug 2017
Hello, Can we use 'parfor' in used defined functions? I want to use parfor in user defined functions to improve the speed of my code but its not working. Is there any way we can use it?

  3 Comments

KSSV
on 6 Aug 2017
What function you are trying to use parfor?
any user define function for example
% code
y=function_name(p);
% called function
function y=function_name(p)
parfor k=1:10
y=p+k
end
end
That use of parfor is not permitted because the output would depend upon which iteration ran last. You need either assign to an indexed variable or you need to use a reduction variable (for example totaling the values of the individual iterations)

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1 Answer

Answer by Walter Roberson
on 6 Aug 2017
 Accepted Answer

Yes, for sure you can, provided that you have the parallel computing toolbox installed and licensed

  4 Comments

Show 1 older comment
I have parallel computing toolbox installed but still its not working, may be I don't know how to handle parfor in called functions. Would you give me a simple example of a code?
function y = function_name(p)
t = 0;
parfor k = 1 : length(p)
t = t + p(k);
end
y = t;
end
Thank you so much

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