how to replicate the array?

i have an array

a = 1 2 3

4 5 6

7 8 9

now i want

a= 1 1 2 3 3

1 1 2 3 3

4 4 5 6 6

7 7 8 9 9

7 7 8 9 9

what command do it

as padarray pad the desire number arround the martix

Answer 1

[TADA]

a = [1, 2, 3; 4, 5, 6; 7, 8, 9];
b = a([1, 1, 2, 3, 3], [1, 1, 2, 3, 3])

b = 5×5

1 1 2 3 3 1 1 2 3 3 4 4 5 6 6 7 7 8 9 9 7 7 8 9 9

c = padarray(a, [1, 1], 'replicate', 'both')

c = 5×5

1 1 2 3 3 1 1 2 3 3 4 4 5 6 6 7 7 8 9 9 7 7 8 9 9