I want to sum elements of array which every element is a matrix.
I wrote below but not working:
AA={[1 2;3 4],[5 6;7 8]}
i=1:2;
sum(AA{i})
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What result would you expect to get for this example? – gnovice May 02 '17 at 19:04
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I want [6 8;10 12] @gnovice – Masoud May 02 '17 at 19:07
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1Is there a reason why you're using a cell array? Why not a 3D array and sum in the third dimension? – rayryeng May 02 '17 at 19:56
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If you are wanting to perform operations across a set of 2-D matrices, all of which are the same size (and not too huge), it's easiest to store them as a 3-D matrix instead. See here for discussion/examples.
If you already have your matrices in a cell array, as in your example, you can concatenate them into a 3-D matrix using cat and sum across the third dimension without a for loop using sum:
mat = sum(cat(3, AA{:}), 3);
