Adding cell array entries

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AA on 23 Aug 2020
Commented: madhan ravi on 24 Aug 2020
Suppose you have a 162*24 cell array called CC and each cell array entry consist of a matrix.
How would you add CC{1,1}+CC{2,1}+CC {3,1}.....CC{162,1}
and then to the same for the remaining 23 columns.
I dont need the sum but all matrices within each cell entry have to be added.

Accepted Answer

Walter Roberson
Walter Roberson on 23 Aug 2020
nd = ndims(CC{1,1});
sol = sum(cat(ndims+1, CC{:,1}),ndims+1);
There are also approaches using the more obscure fold() operation.
AA on 24 Aug 2020
I get an error Not enough input arguments and and also an unspecific error in the second line. Maybe the nd variable is missing in the second line?
madhan ravi
madhan ravi on 24 Aug 2020
nd = ndims(CC{1,1});
sol = sum(cat(nd+1, CC{:,1}),nd+1);

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More Answers (1)

Sara Boznik
Sara Boznik on 23 Aug 2020
for i=1:24
  1 Comment
Walter Roberson
Walter Roberson on 23 Aug 2020
No, not for a cell array. sum() does not apply to cell arrays.
Also, you are overwriting all of sol each iteration.

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