# parfor and global variables

조회 수: 14(최근 30일)
MRC 2013년 11월 1일
댓글: MRC 2013년 11월 4일
Hi, could you help me please in solving this problem? I need to use parfor and at the same time the function simuconf inside parfor uses global variables. I have read other similar questions but I haven't been able to find a solution. Thanks a lot!
B=7;
coeffconfidsimple=randn(200,2);
cutoffcoeffs=size(coeffconfidsimple,1);
temp=zeros(B,201);
parfor w=1:B
mstr=num2str(w);
E=load(['freq' mstr '.mat']); %and freq(w) and I have to transform them in
%numerical arrays
C= struct2cell(A);
D= struct2cell(E);
global subdata
global freq
subdata= cell2mat(C);
freq=cell2mat(D);
compare=zeros(cutoffcoeffs,1);
for x=1:cutoffcoeffs
[compare(x)]=simuconf(coeffconfidsimple(x,:)'); %This function uses
%subdata and freq
%at each iteration
end
temp(w,:)=[w ((compare)*size(subdata,1))'];
end

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### 채택된 답변

Doug Hull 2013년 11월 1일
Why use globals? They are often just confusing and hard to debug. Just pass them into simuconf.

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### 추가 답변(1개)

Haithem Bouziri 2013년 11월 1일
I think you have to use matlabpool before using parfor , matlabpool(n) must call n workers to execute your parfor. n <= number of core in your processor.
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MRC 2013년 11월 4일
Thank you very much!

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