Creating a matrix which contains submatrices

So i want to create 2nX2n matrix that asks a number from user which called n.Also this matrix has 4 of n x n submatrices that element of submatrices bottom left corner consist zeros ?

Answer 1

[Akira Agata]

Assuming the submatrix is n-by-n Identity matrix, the solution would be like this:

n = input('Please enter n: ');
subMat = eye(n);
M = repmat(subMat,2,2);