How to use combinatorial function with different element possibilities?

I would like to have all the possible combinations of the elements of a vector. However, I don't know how to use the nchoosek function when each element of the vector is not fixed. It can be either 0 or 1. For example:

0 0 0 0, 0 0 0 1, 0 0 1 1, 0 1 1 1, 1 1 1 1, 1 1 0 0, 1 0 1 0 etc...

Is there a function which can capture different possible elements? Thank you so much in advance!

Answer 1

[Jan]

You can use http://www.mathworks.com/matlabcentral/fileexchange/26242-vchoosekro, bu it needs to be compiled. Then:

v = [0,1];
n = 4;
R = VChooseKRO(v, n)

If compiling is a problem, use this http://www.mathworks.com/matlabcentral/fileexchange/24325-combinator-combinations-and-permutations .

index = combinator(length(v), n,'p','r')
R     = v(index);  % Untested code