HOW TO MOVE THE ELEMENTS BACK IN ORDER IN MATRICS WHICH ARE BEEN MOVED DIAGONALLY

1 4 6 8 2 3 7 9 5

all elements are move diagonally one pixel for m*n matix WHEN APPLYING THE FOLLOWING CODE

I = [
     1     4     6
     8     2     3
     7     9     5]; % initial array

idx = reshape(1:numel(I),size(I));
for jj = -size(I,1) + 2 : size(I,2) - 2
    a = diag(idx,jj);
    I(a) = I(circshift(a,1));
end

example output

2 3 6

9 5 4

7 8 1

HOW TO GET THE ORIGINAL RESULT TO SHIFT DIAGONALLY . THE EXAMPLE OUTPUT IS

1 4 6 8 2 3 7 9 5

Answer 1

[Matt Fig]

Are you asking how to undo what your code does?

for jj = -size(I,1) + 2 : size(I,2) - 2
    a = diag(idx,jj);
    I(a) = I(circshift(a,-1));  % Note the -1
end

[ajith]

THANKS A LOT SIR