How to insert a smaller diagonal into a Matrix?

I'm struggling to generate a matrix M=[0 0 1 0 0; 0 0 0 1 0; 0 0 0 0 1; 0 0 0 0 0; 0 0 0 0 0], quickly without entering each entry by hand. I gather there is a quicker way.

I know I can create the 5x5 identity matrix using M=eye(5) but am unsure how to move the diagonal of 1s across 2. Any help would be appreciated

Answer 1

[Geoff Hayes]

Monkeyman - try using diag as

 D = diag([1 1 1],2)

[Monkeyman]

I knew it was so simple, I just couldn't think of it, many thanks