Y = rotateDown(X) Y = rotateDown(X,k)
(Matrix|Array|Index) Y; (Matrix|Array|Index) Y;
(Matrix|Array|Index) X; (Matrix|Array|Index) X;
Integer k;
>> Y = rotateDown([[1 2][3 4][5 6]])
=== [Y] : ( 3, 2) ===
( 1) ( 2)
( 1) 5.00000000E+00 6.00000000E+00
( 2) 1.00000000E+00 2.00000000E+00
( 3) 3.00000000E+00 4.00000000E+00