Let's say my vectors don't contain doubles. They contain cells. combvec refuses to accept cell values... for example:
m = {
[cell1, cell2, cell3];
[cell4, cell5];
[cell6];
};
I want to somehow get a vector of vector of cells, containing all possible combinations of cells: [[cell1, cell4, cell6]; [cell1, cell5, cell6]; [cell2, cell4, cell6]; [cell2, cell5, cell6]; [cell3, cell4, cell6]; [cell3, cell5, cell6];];.
How can it be done?
P.S. The reason I'm doing this is because I have grouped items, and I want to find all combinations of them, so I thought inserting them into nx1 cells. If there's a better solution, please advise...
Just use combvec with arrays of integers representing the column index, then use that to index your original array
C = {[{1} {2} {3}]; [{4} {5}]; [{6}]}
cv = combvec(1:3, 1:2, 1)
out = [C{1}(1,cv(1,:)); C{2}(1,cv(2,:)); C{3}(1,cv(3,:))];
You could generalise this like so (there may be a neater way)
idx = cellfun(@(x) 1:numel(x), C, 'uni', 0); % set up indexing array
cv = combvec(idx{:}); % get combinations
out = arrayfun(@(x) C{x}(1,cv(x,:)), 1:3, 'uni', 0); % index into the cell array
out = vertcat(out{:}); % concatenate results
% Result
>> out =
{[1]} {[2]} {[3]} {[1]} {[2]} {[3]}
{[4]} {[4]} {[4]} {[5]} {[5]} {[5]}
{[6]} {[6]} {[6]} {[6]} {[6]} {[6]}