`rev`

provides a reversed version of its argument. It is generic
function with a default method for vectors and one for
`dendrogram`

s.

Note that this is no longer needed (nor efficient) for obtaining
vectors sorted into descending order, since that is now rather more
directly achievable by `sort(x, decreasing = TRUE)`

.

`rev(x)`

x

a vector or another object for which reversal is defined.

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
*The New S Language*.
Wadsworth & Brooks/Cole.

# NOT RUN { x <- c(1:5, 5:3) ## sort into descending order; first more efficiently: stopifnot(sort(x, decreasing = TRUE) == rev(sort(x))) stopifnot(rev(1:7) == 7:1) #- don't need 'rev' here # }