MATLAB: Interleaving columns of two cell arrays

cell arraysinterleaving

Hey all,
I have two cell arrays:
  • ca = 7×9 cell array where each cell is a block of pixels 64x64x3
  • ca2 = 7×8 cell array where each cell is a block of pixels 64x64x3
I would like to interleave the cell array by columns like so:
  • ca3 = {ca{:,1};ca2{:,1};ca{:,2};ca2{:,2};ca{:,3};ca2{:,3};ca{:,4};ca2{:,4};ca{:,5};ca2{:,5};ca{:,6};ca2{:,6};ca{:,7};ca2{:,7};ca{:,8};ca2{:,8};ca{:,9}}';
I'm sure there has to be a more programmatic way of doing this and in a more extensible fashion(where if I have more then 8/9 columns I wouldn't have to keep adding to the code).
Thanks! Hope this makes sense

Best Answer

Here's a function I wrote for you. It contains a subfunction to create the interleaving index. Save this to interleaveCells.m and try calling it.
function c = interleaveCells(c1,c2)
% Make index for interleaving cells
ind = interleaveIndex(size(c1,2),size(c2,2));
% Combine cells
c = [c1, c2];
% Interleave cells
c = c(:,ind);
function ind = interleaveIndex(n1,n2)
ind = NaN(1, n1 + n2);
i = 1;
j = 1;
while i<=n1,
ind(i+j-1) = i;
i = i + 1;
if j<=n2,
ind(i+j-1) = n1 + j;
j = j + 1;
end
end
while j<=n2,
ind(i+j-1) = n1 + j;
j = j + 1;
end
Hope this helps.