Can we use 'parfor' in user defined function?

2017 8 6
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更新时间：2017 8 7
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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?

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KSSV
KSSV 2017-8-6
What function you are trying to use parfor?
Mohsin Shah
Mohsin Shah 2017-8-6
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
Walter Roberson
Walter Roberson 2017-8-6
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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Walter Roberson
Walter Roberson 2017-8-6

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

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Mohsin Shah
Mohsin Shah 2017-8-7
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?
Walter Roberson
Walter Roberson 2017-8-7
function y = function_name(p)
t = 0;
parfor k = 1 : length(p)
t = t + p(k);
end
y = t;
end

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