How do I add 1 arrays elements into another array

I would like to amend 1 matrix into another matrix of the same size that would double the array in length. For instance I have a 1 x 1001 matrix that I would like to add to another matrix of 1 x 1001 to make 1 1 x 2002 matrix

Answer 1

[Adam]

a = [b c];

[Jan]

Or with the comma explicitly:

a = [b, c]

This avoid some troubles in the case of using numerical scalars and operators, see:

[2-3], [2 -3], [2 - 3], [2, -3]

But in your case it is unequivocal.

Alternative:

cat(2, b, c)

or

horzcat(b, c)