Hi,
The ndgrid function almost gives the answer, but has one caveat: n output variables must be explicitly defined to call it. Since n is arbitrary, the best way is to use a comma-separated list (generated from a cell array with ncells) to serve as output. The resulting n matrices are then concatenated into the desired n-column matrix:
As an example:
vectors = { [1 2], [3 6 9], [10 20] }; %input data: cell array of vectors
n = numel(vectors); % number of vectors
combs = cell(1,n); % pre-define to generate comma-separated list
[combs{end:-1:1}] = ndgrid(vectors{end:-1:1}); % the reverse order in these two
% comma-separated lists is needed to produce the rows of the result matrix
combs = cat(n+1, combs{:}); %concat the n n-dim arrays along dimension n+1
combs = reshape(combs,[],n); %reshape to obtain desired matrix
Regards,
