How can I compute all possible combinations of a matrix?

I have a set of 10 samples that have 6 variables each, creating a 6x10 matrix. I am needing to compute all possible combinations of the individual samples (including all variables as they are dependent). I can easily create all possible combinations of a vector 1:10 using the combntns command, but I am then unable to relate this to my data.

Is there a simple solution for creating combinations of a matrix?

Thank you in advance for taking time to help.

[Iain]

Do you need to store every combination, or can you use a single combination at a time?