How Can I convert a 1 by 1 array into multidimensional array?

For example i have

a=[1]

I want to convert it into

a=[1111 1111 1111
   1111 1111 1111
   1111 1111 1111]

Can anyone please help me here.

Answer 1

[Star Strider]

One approach:

a = [1];
a = a*ones(1, 36);
a = reshape(a, [], 4);

Answer 2

[Walter Roberson]

repmat(a, 3, 4, 3)

perhaps