Y = shiftLeft(X) Y = shiftLeft(X,k)
(Matrix|Array|Index) Y; (Matrix|Array|Index) Y;
(Matrix|Array|Index) X; (Matrix|Array|Index) X;
Integer k;
>> Y = shiftLeft([[1 2 3][4 5 6]])
=== [Y] : ( 2, 3) ===
( 1) ( 2) ( 3)
( 1) 2.00000000E+00 3.00000000E+00 0.00000000E+00
( 2) 5.00000000E+00 6.00000000E+00 0.00000000E+00