### 2.42.23 Make a matrix from two matrices : `augment concat`

`augment` or `concat` concats two matrices *A* and *B*
having the same number of rows, or having the same number of columns.
In the first case, it returns a matrix having the same number of rows
than *A* and *B* by horizontal gluing, in the second case
it returns a matrix having the same number of columns by
vertical gluing.

Input :

`augment([[3,4,5],[2,1,0]],[[1,2],[4,5]])`

Output :

`[[3,4,5,1,2],[2,1,0,4,5]]`

Input :

`augment([[3,4],[2,1],[0,1]],[[1,2],[4,5]])`

Output :

`[[3,4],[2,1],[0,1],[1,2],[4,5]]`

Input :

`augment([[3,4,2]],[[1,2,4]]`

Output :

`[[3,4,2,1,2,4]]`

Note that if *A* and *B* have the same dimension, `augment`
makes a matrix with the same number of rows than *A* and *B*
by horizontal gluing, in that case
you must use `semi_augment` for vertical gluing.

Input :

`augment([[3,4],[2,1]],[[1,2],[4,5]])`

Output :

`[[3,4,1,2],[2,1,4,5]]]`