matrix insert with a condition

can you help me insert m x n matrix into M x N matrix with a condition that is without zero.

starting location is (x,y)

M x N =

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

m x n =

0 2 2 0

2 2 2 2

0 2 2 0

(x,y) = (4,3)

M x N =

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 2 2 1 1 1 1

1 1 1 2 2 2 2 1 1 1

1 1 1 1 2 2 1 1 1 1

Answer 1

[Guillaume]

A = [1 1 1 1 1 1 1 1 1 1 
     1 1 1 1 1 1 1 1 1 1 
     1 1 1 1 1 1 1 1 1 1 
     1 1 1 1 1 1 1 1 1 1 
     1 1 1 1 1 1 1 1 1 1];
B = [0 2 2 0 
     2 2 2 2 
     0 2 2 0];
row = 3; col = 4;

toinsert = B + ~B .* A(row:row+size(B, 1)-1, col:col+size(B, 2)-1);
A(row:row+size(B, 1)-1, col:col+size(B, 2)-1) = toinsert

[JK]

thanks for your feedback.

I am looking for a solution with a larger matrix which unfortunately i can't do all the individual calculations.

[Guillaume]

What individual calculations?

The code above is completely generic and will work for any size A and B and wherever any zeros are in B.

If it doesn't work for your generic case, then you need to explain a lot better what it is you want.