array exceeds maximum array size preference (when summing)

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Yugarshi Mondal
Yugarshi Mondal 2020-9-1
评论： Rik 2020-9-1
I'm running a simulation that outputs a very long vector (of length 4 by 599901 -- only taking the fourth row).
I want to keep producing simulations of this length and add it to the previous result:
storage(kk,kkk,:) = soln(4,:) + storage(kk,kkk,:);
However I'm recieving the following error:
Requested 1x599901x599901 (2681.3GB) array exceeds maximum array size preference. Creation of arrays
greater than this limit may take a long time and cause MATLAB to become unresponsive.
I can complete the simulation and plot it, but I can't sum it in the way I've described? I think I'm bungling something. Can anyone help?

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回答（1 个）

Rik
Rik 2020-9-1
Use squeeze around the two terms you want to sum. The dimensions are different, so your current code attempts to use dynamic expansion, which would result in a huge matrix.
  2 个评论
Yugarshi Mondal
Yugarshi Mondal 2020-9-1
Maybe I should say kk and kkk are fixed by a loop.
Neither of the following worked:
storage(kk,kkk,:) = squeeze(soln(4,:))+squeeze(storage(kk,kkk,:));
storage(kk,kkk,:) = squeeze(soln(4,:)+storage(kk,kkk,:));
Other ideas?
Rik
Rik 2020-9-1
Yes: put squeeze around both terms:
storage(kk,kkk,:) = squeeze(soln(4,:)) + squeeze(storage(kk,kkk,:));

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