parfor loop vectorized array

2012 8 8
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Hello,
Long story short, I have a code that takes roughly 12 hours to run on one core, and am looking to make things faster. I have the parallel tool box and looking into parfor loops for my solution. There is a 4-D array, 97x97x2x3, that I am vectorizing to take apart, modify, and put back together. When i take it apart, I have to pay close attention to my indices before modifying. Matlab tells me there is an error when trying to take apart my variable. Does Matlab not like vectorized arrays in a parfor loop? A work around I am currently trying is to create a mask and do a .* on my array. My question – Dose Matlab not like 4-D arrays in a parfor loop, or is it that I’m vectorizing the array?

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Oleg Komarov
Oleg Komarov 2012-8-8
编辑：Oleg Komarov 2012-8-8
Can you please post the warning that mlint is giving you?
Or even better a sample code that reproduces the problem.
Matthew
Matthew 2012-8-8
编辑：Matthew 2012-8-8
Alt(:,:,1,:) = Alt(:,:,1,:)/A;
Alt(:,:,2,[1 3])= Alt(:,:,2,:)[1 3])/(A*B);
Alt(:,:,2,2) = Alt(:,:,2,2)*A;
The error is: Valid indices for Alt are restricted in PARFOR loops.
Kevin Claytor
Kevin Claytor 2012-8-8
This
Alt(:,:,2,:)[1 3])/(A*B)
dosen't look like valid syntax. Do you mean;
Alt(:,:,2,[1 3])/(A*B)
Matthew
Matthew 2012-8-8
yes, I made a typo when writing the code down here, i thought I proofed it correctly >.<
Alt(:,:,1,:) = Alt(:,:,1,:)/A;
Alt(:,:,2,[1 3])= Alt(:,:,2,[1 3])/(A*B);
Alt(:,:,2,2) = Alt(:,:,2,2)*A;

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Matthew
Matthew
2012-8-8

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