matrix manipulation - replacing partial matrix subsets in main matrix ???

I have two matrices : one is NxM and other is nxm (N>n, M>m).

I would like to insert nxm matrix at location starting at (x,y) by replacing existing subset.

example)

initial NxM

= 1 1 1 1 1

1 1 1 1 1

1 1 1 1 1

nxm

= 2 2

2 2

(x,y) = (3,2)

final NxM

= 1 1 1 1 1

1 1 2 2 1

1 1 2 2 1

what is a way to do this using matlab?

thanks,

Answer 1

[Josh]

You can use colon indexing:

% Create the two matrices in your example
A = ones(3, 5);
B = 2 * ones(2, 2);

% Use indexing to assign B to a sub-array of A
A(2:3, 3:4) = B;