Adding a row to a matrix in Q?

Question

I currently have a 3 by 3 matrix "m":

1 2 3
4 5 6
7 8 9

I would like to add a row to matrix 'm' to have a resultant matrix of:

1 2 3
4 5 6
7 8 9
10 11 12

Answer 1

A matrix in q is just a list of lists where inner lists represent rows.

m: ((1 2 3);(4 5 6);(7 8 9))

In order to add one more row all you have to do is add one more inner list to it:

m: m,enlist 10 11 12

enlist is important here, without it you'll end up with this:

q)((1 2 3);(4 5 6);(7 8 9)),10 11 12
1 2 3
4 5 6
7 8 9
10
11
12