How can I add the elements of a smaller matrix in the elements of a bigger matrix at some specified locations ???

Is there any direct way of adding matrix "B" directly in "A" to get "D" matrix ??? I did it the following way...

A=ones(5);
B=ones(2);
C=zeros(5); 
C(1:2,1:2)=B;   
D=C+A;

Answer 1

[James Tursa]

Another way:

D = A;
D(1:2,1:2) = D(1:2,1:2) + B;

Or, if you don't know the size of B in advance or where you want it added in:

i = row index of replacement spot
j = col index of replacement spot
[m,n] = size(B);
D = A;
D(i:i+m-1,j:j+n-1) = D(i:i+m-1,j:j+n-1) + B;

[Asif Arshid]

Thanks James Tursa, I got it, its working.