problems with parfor and matlabpool: Error using parallel_function at 598

Question

MRC 2013-11-4

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/104818-problems-with-parfor-and-matlabpool-error-using-parallel_function-at-598

回答： Matt J 2013-11-4

Hi, I'm trying to speed up my code using parfor instead of for but it doesn't work. It gives me the error: ??? Error using ==> parallel_function at 598 Error in ==> simuconf at 186 Matrix dimensions must agree. Do you have any suggestion? Thank you very much!

global n m B b r
m=5;  
n=4;     
B=7; 
b=3;                                                                        
r=10;
temp=zeros(B,201);
load coeffconfidsimple
cutoffcoeffs=size(coeffconfidsimple,1);
matlabpool open 2
tic
parfor w=1:B    
    mstr=num2str(w);  
    subsubdata=load(['subdata' mstr '.mat']);
    subfreq=load(['freq' mstr '.mat']);
    C= struct2cell(subsubdata);
    D= struct2cell(subfreq);   
    subdata= cell2mat(C);
    freq=cell2mat(D);
compare=zeros(cutoffcoeffs,1);  
for x=1:cutoffcoeffs
    [compare(x)]=simuconf(coeffconfidsimple(x,:)',subdata,freq); %simuconf is a function of    three arguments; in addition it uses the global variables stated at the beginning
end
temp(w,:)=[w (compare*size(subdata,1)'];     
end
toc

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Answer 1

Matt J 2013-11-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/104818-problems-with-parfor-and-matlabpool-error-using-parallel_function-at-598#answer_114077

Another thing to try is putting line 186 of simuconf inside a try...catch. If an error occurs, write all data used on line 186 to a .mat file and abort. Then, you can examine the sizes and contents of the matrices in the mat file to see what went wrong.