Node Pair list from a graph

How can I get a matrix of node pairs from a graph? That is, if there are 4 nodes 1,2,3,4, then the node pair matrix would be :

1 2

1 3

1 4

2 3

2 4

3 4

I could do this using 2 for loops, but is there any quick way of doing it?

Answer 1

[Bruno Luong]

nchoosek(1:4,2)

[Hari]

Thanks :)