can anybody please help me to define this?

Actually I am looking for a speacial function in matlab which I can use to define this matrix. I have used it in past but now I don't remember it. It is a builtin functino to define these sort of matrices.

If anybody can help me pls...

Thanks

Answer 1

[John D'Errico]

Special? Not really.

help diag

[Steven Lord]

If the matrix is going to be large and all the values above and below those three diagonals are 0, consider spdiags to make this as a sparse matrix.

[Muhammad Asif]

Thanks Steven Lord that (spdiags) was the function I was looking for