How to replace middle value of matrix 4x4 with the other matrix 2x2?

I have matrix A with size 4x4, and I want to replace the middle value of matrix A(size 2x2) with matrix B, the matrix B have size 2x2. Thanks.

Answer 1

[Wayne King]

A = randn(4,4);
B = randi([0 1],2,2);
A([6 7 10 11]) = B;

I determined those linear indices using:

sub2ind([4 4],[2 2 3 3],[2 3 2 3])

[Andi Tarigan]

Thanks. And what if I have a matrix A (4x4) with a size of (1x64 cell), and the matrix B (2x2) with size of (1x64 cell)? And I want to replace all of the matrix A.