How to change array element with another array

hi all, so i have 2 array and i want to change the value of array1 to array2. for example i have:

a = [1 1 1; 1 1 1; 1 1 1]
b = [4 4; 4 4]

and i want the array to be like this :

c = [4 4 1; 4 4 1; 1 1 1]

basicaly i want 'b' to be inside 'a' and replace all element 'a' in the same position as 'b' hehe what is the simplest code for this? thanks

Answer 1

[Azzi Abdelmalek]

 a = [1 1 1; 1 1 1; 1 1 1]
b = [4 4; 4 4]
[n,m]=size(b)
a(1:n,1:m)=b

Answer 2

[Andrei Bobrov]

n = size(b);
c = a;
c(1:n(1),1:n(2)) = b;