Keyed Ordering Permutation

order2(
  ...,
  key = identity,
  na.last = TRUE,
  decreasing = FALSE,
  method = c("auto", "shell", "radix")
)

Arguments

...: a sequence of numeric, complex, character or logical vectors, all of the same length, or a classed R object.
key: A function that takes a single argument, defaults to identity
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 (see ‘Note’.)
decreasing: logical. Should the sort order be increasing or decreasing? For the "radix" method, this can be a vector of length equal to the number of arguments in ... and the elements are recycled as necessary. For the other methods, it must be length one.
method: the method to be used: partial matches are allowed. The default ("auto") implies "radix" for numeric vectors, integer vectors, logical vectors and factors with fewer than \(2^{31}\) elements. Otherwise, it implies "shell". For details of methods "shell", "quick", and "radix", see the help for sort.

An integer vector with the ordered indices of the input data