rev                   package:base                   R Documentation

Reverse a Vector's Elements

Description:

     `rev' provides a reversed version of its argument. It can be used
     in combination with `sort' to obtain vectors sorted into
     descending order.

Usage:

     rev(x)

Arguments:

       x: a vector.

See Also:

     `seq', `sort'.

Examples:

     x <- c(1:5,5:3)
     # sort into descending order
     rev(sort(x))
     stopifnot(rev(1:7) == 7:1)#- don't need `rev' here

