2 reverse - reverse a copy of a list or matrix
13 For a list or matrix x, reverse(x) returns a list or matrix in
14 which the order of the elements has been reversed. The original
15 list or matrix x is unchanged.
17 In the case of matrix x, the returned value is a matrix with
18 the same dimension and index limits, but the reversing is performed
19 as if the matrix were a linear array.
22 > A = list(1, 7, 2, 4, 2)
25 list (5 elements, 5 nonzero):
32 > mat B[2,3] = {1,2,3,4,5,6}
35 mat [2,3] (6 elements, 6 nonzero):