MATLAB: How to generate combinations without storing them in an array

Question

I'm trying to generate all the combinations of the elements of a vector in Matlab. When the vector is of length greater than 20, the storage memory is insufficient, so if I work with the commands " c = nchoosek(v, k)" or "out = combntns (choicevec, choose)" I can not pass that limit. Is there any way to generate all the combinations that arise from these two commands without the need to be stored in an array?

Answer 1

Maybe this FEX submission "COMBINATOR -combinations AND permutations":

http://www.mathworks.com/matlabcentral/fileexchange/24325

There is also a discussion on the topic here:

http://blogs.mathworks.com/pick/2007/03/02/all-combinations-from-vectors/