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Saving large files within parfor loops

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Nicholas Ayres
Nicholas Ayres on 6 Jul 2020
Commented: Kojiro Saito on 8 Jul 2020
i am trying to save variables >2Gb to separate .mat files from within a parfor loop. I have written a parsave function and explecitly called '-v7.3' from within my parsave function. See below.
function parsave(file,camData)
save(file,'camData','-v7.3')
end
However, whenever the data gets to this point, I get the
"Could not save because data was larger than 2GB. Use -v7.3 to save variables larger than 2GB" warning.
Does anyone know why this is/how I can get around this issue? It seems weird that MatLab calls this issue when I've explicitly told it to act on it.
  1 Comment
Kojiro Saito
Kojiro Saito on 8 Jul 2020
I've tested the following code in R2019b but couldn't reproduce the warning which you got. It works well.
parfor ii=1:2
a = ones(2^31+ii, 1);
fname = sprintf("result_%d.mat", ii);
parsave(fname, a)
end
function parsave(file, var)
save(file, 'var', '-v7.3')
end
Is there any different from your actual code?

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