Translate a matrix with nested loops?

I need to translate a matrix up and to the right with nested loops.

The code should be able to take any matrix A...

A=
[1  2  3  4  5;
 6  7  8  9 10;
11 12 13 14 15;
16 17 18 19 20]

...and translate it by user inputs X and Y (2 and 2, in this example) to produce matrix B...

B=
[0  0  11 12 13;
 0  0  16 17 18;
 0  0  0  0  0;
 0  0  0  0  0]

Answer 1

[Roger Stafford]

No need for loops:

up = 2; right = 2;
B = zeros(size(A));
B(1:end-up,1+right:end) = A(1+up:end,1:end-right);

Answer 2

[dpb]

Alternate

B=circshift(A,[up right]);
B(:,1:right)=0; B(end-up+1:end,:)=0;

I've always thought there should be a companion to cirshift that shifts in a constant or by default zero...think I've made the enhancement request a time or two, even.