Concatenate arrays

`C = cat(`

concatenates `dim`

,`A1,A2,…,An`

)`A1`

, `A2`

, … , `An`

along
dimension `dim`

.

You can use the square bracket operator `[]`

to concatenate. For
example, `[A,B]`

or `[A B]`

concatenates arrays
`A`

and `B`

horizontally, and `[A; B]`

concatenates them vertically.

When concatenating an empty array to a nonempty array, `cat`

omits the
empty array in the output. For example, `cat(2,[1 2],[])`

returns the row
vector `[1 2]`

.

If all input arguments are empty and have compatible sizes, then `cat`

returns an empty array whose size is equal to the output size as when the inputs are nonempty.
For example, `cat(2,zeros(0,1),zeros(0,2))`

returns a 0-by-3 empty
array.