Ordering Permutation

ORDER is a generic function for computing ordering permutations.

ORDER(x, ...)
# Default S3 method
ORDER(x, ..., na.last = TRUE, decreasing = FALSE)

Arguments

x

an object.

...

further arguments to be passed to methods.

na.last

for controlling the treatment of NAs. If TRUE, missing values in the data are put last; if FALSE, they are put first; if NA, they are removed.

decreasing

logical. Should the sort order be increasing or decreasing?

Details

ORDER is a new generic function which aims at providing the functionality of the non-generic base function order for arbitrary objects. Currently, there is only a default method which simply calls order. For objects (more precisely if is.object is TRUE) order leverages the generic xtfrm. Thus, to assure ordering works, one can supply either a method to xtfrm or to ORDER (or both).

See also

order

Examples

ORDER(rnorm(5))
#> [1] 1 5 2 3 4