MATLAB: Split 2 lines of a matrix

Question

I have this 4×4 matrix.

I want to get lines 3 and 4 to put them up on the matrix, like:

0 1 1 1 1 1 1 1

1 1 1 1 to 0 1 1 1

1 1 1 1

I've made a 2×4 example to make things easier.

Thanks

Answer 1

B=[A(3:4,:);A];        % create new array keeping old
A=[A(3:4,:);A];        % new array replaces/augments old

More generically,

N=2;                     % number rows at end to add to beginning
A=[A(end-N+1:end,:);A];  % add N last lines at beginning