Create a special diagonal matrix

Question

I want to create a special diagonal matrix in MATLAB that uses [1 1] or any other array as main diagonal elements. Something like the following:

[1   1   0   0   0   0
 0   0   1   1   0   0
 0   0   0   0   1   1]

How can I do that without using any loop structures?

Answer 1

Let

v = [1 1];
n = 3;

• Using kron :

   result = kron(eye(n), v); 

• Using blkdiag :

   vv = repmat({v}, 1, n); result = blkdiag(vv{:});