# rev

##### Reverse Elements

`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)`

.

- Keywords
- manip

##### Usage

`rev(x)`

##### Arguments

- x
- a vector or another object for which reversal is defined.

##### References

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

##### See Also

##### Examples

`library(base)`

```
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
```

*Documentation reproduced from package base, version 3.3.2, License: Part of R 3.3.2*

### Community examples

Looks like there are no examples yet.