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Sum over cell array of sparse matrices error: Dimension for sparse matrix concatenation must be <= 2.

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Hi all,
I have a cell contains sparse matrices,
K>> a
a =
2×1 cell array
[12×12 double]
[12×12 double]
Now I'd like to sum these 2 sparse matrices into 1. I tried:
K>> sum(cat(3, a{:}), 3)
which gave me error:
Error using cat
Dimension for sparse matrix concatenation must be <= 2.
This line works for non-sparse matrices, but not for sparse matrices. Any idea how to do it?

Risposte (1)

Andrei Bobrov
Andrei Bobrov il 3 Nov 2017
a = cellfun(@full,a,'un',0);
  1 Commento
Xiaohan Du
Xiaohan Du il 3 Nov 2017
Nah, here a is 12 by 12 only for testing, in my real code it could be very large, so can only deal with sparse matrices, no back to full matrices.

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