find the pair of the matrix

a= [ 3 4 5; 7 8 9; 3 6 8 ; 4 6 9; 3 6 5]

I expected the answer is

b=

 [ (3,4) (4,3)
   (4,5) (5,4)
   (7,8) (8,7)
  (8,9)  (9,8)
(3,6)   (6,3)
(6,8)   (8,6)
(4,6)   (6,4)
(6,9)   (9,6)
(3,6)    (6,3)
(6,5)    (5,6)

Answer 1

[Giorgos Papakonstantinou]

Maybe you ask for this:

   D = reshape([a.' circshift(a.',-1)], [], 2);
   D(size(a,2):size(a,2):end,:)=[];
   out =[D fliplr(D)]