shift a block of rows to the end of a matrix

Hi,

Suppose I have a matrix:

A = [0    0.2000;
     0    0.1578;
     0    0.0721;
     0         0;
     0         0;
    0.2000     0;
    0.3993     0;
    0.4000     0;
    0.5428     0;
    0.6000     0];

and I need to shift all rows from the beginning until the first ( 0 0) to be put at the end of the matrix so it looks as:

A = [0         0;
    0.2000     0;
    0.3993     0;
    0.4000     0;
    0.5428     0;
    0.6000     0;
    0    0.2000;
    0    0.1578;
    0    0.0721;
    0         0];

I understand that circshift could work, but a generic algorithm of how to do such a shift would be helpful for any matrix A of such form.

Any help would be appreicted.

Answer 1

[Stephen23]

A = [0,0.2;0,0.1578;0,0.0721;0,0;0,0;0.2,0;0.3993,0;0.4,0;0.5428,0;0.6,0]

A = 10×2

0 0.2000 0 0.1578 0 0.0721 0 0 0 0 0.2000 0 0.3993 0 0.4000 0 0.5428 0 0.6000 0

N = find(all(A==0,2),1,'first');
B = circshift(A,-N,1)

B = 10×2

0 0 0.2000 0 0.3993 0 0.4000 0 0.5428 0 0.6000 0 0 0.2000 0 0.1578 0 0.0721 0 0

[LH]

Brilliant! Thanks.