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matlabcell-array

multiple cell reference

I have a cell array, lets say C. Each cell contains a matrix.

For example lets say C is

C{1}=[1 2;3 4;5 6]
C{2}=[7 8;9 10;11 12]

How can I create a new cell array D, whose i-th element is a matrix consisted by the i-th transposed rows of all matrices in C?

Then D must be 

D{1}=[1 7;2 8]
D{2}=[3 9;4 10]
D{3}=[5 11;6 12]
Solution

  • Given that C is always of the size you have specified, you can try the following rather clumsy solution: 

    C{1}=[1 2;3 4;5 6]
C{2}=[7 8;9 10;11 12]


tmp = reshape( [C{:}]', 2,2,3);

D = arrayfun(@(x) squeeze(tmp(:,:,x)), 1:3, 'UniformOutput',  false);

    This results in

    >> D{:}

ans =

     1     7
     2     8


ans =

     3     9
     4    10


ans =

     5    11
     6    12

    For matrices of arbitrary size, you can use

    n = length(C);
[q,p] = size(C{1});

tmp = reshape( [C{:}]', p, n, q);

D = arrayfun(@(x) squeeze(tmp(:,:,x)), 1:n, 'UniformOutput',  false);