Question

For e.g., if [1,2,3,4,5,6] is a vector, then all possible combinations of 3 items at a time is

 4     5     6
 3     5     6
 3     4     6
 3     4     5
 2     5     6
 2     4     6
 2     4     5
 2     3     6
 2     3     5
 2     3     4
 1     5     6
 1     4     6
 1     4     5
 1     3     6
 1     3     5
 1     3     4
 1     2     6
 1     2     5
 1     2     4
 1     2     3

How do I find this in MATLAB?

Answer 1

Try this link. Basically you just need to type c = combnk(1:6,3). Hope it helps.

Edit: The difference between what I proposed and @nash ‘s combntns is the toolbox that the commands are in. combnk is in the Statistics Toolbox, while combntns is in the Mapping Toolbox.