parfor and global variables

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);  
    A=load(['subdata' mstr '.mat']); %At each iteration I load subdata(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

Answer 1

[Doug Hull]

Why use globals? They are often just confusing and hard to debug. Just pass them into simuconf.

Answer 2

[Haithem Bouziri]

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.

[MRC]

Thank you very much!