All combination for a cell structure?
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Xiaohan Du
on 26 Sep 2016
Commented: Andrei Bobrov
on 26 Sep 2016
Hi all,
I'd like to get all combinations for all elements in a cell structure. For example,
var = rand(20, 3);
no = 5;
numcell = mat2cell(var, size(var, 1)/no*ones(1, no), ones(1, 3));
result in a 5 by 3 cell 'numcell' which contains 4 by 1 double for each cell.
I'd like to find all combinations among 5 by 3 'numcell', performing the calculation numcell{:}*numcell{:}' for each cell element of numcell. So that I'll get all permutation and combination of numcell{i}'*numcell{j}.
Thanks!
Accepted Answer
Andrei Bobrov
on 26 Sep 2016
Edited: Andrei Bobrov
on 26 Sep 2016
I correctly understand:
out = cellfun(@(x)a(:).'*a(:),numcell);
5 Comments
Stephen23
on 26 Sep 2016
Edited: Stephen23
on 26 Sep 2016
@Xiaohan Du: so what is the point in converting the data to a cell array, when the first step when performing this calculation is to get all the numeric arrays out of the cell array and concatenate them together?
Why bother with the cell array at all, when you don't use it for anything?
Andrei Bobrov
on 26 Sep 2016
I am agree with Stephen, just:
a = reshape(var,4,:);
M = a.'*a;
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