How do I copy a 320x240 matrix into a 640x480 matrix and expand everything 200%?

Hi, For various reasons I need to use a 320x240 matrix (call it A) to compute it's element values, but then I need a 640x480 matrix (call it B) in which each element of A is twice as large in B. Thus A(1,1) will go to B(1:2,1:2), etc...

Is there a "fast" way to simply say "double the size of this matrix"?

Thanks, Ray

Answer 1

[Andrei Bobrov]

B = kron(A,ones(2));

[Raymond]

Thanks!