stringi (version 1.1.2)

stri_order: Ordering Permutation and Sorting

Description

stri_order determines a permutation which rearranges strings into an ascending or descending order. stri_sort sorts the vector according to a lexicographic order.

Usage

stri_order(str, decreasing = FALSE, na_last = TRUE, ..., opts_collator = NULL)
stri_sort(str, decreasing = FALSE, na_last = NA, ..., opts_collator = NULL)

Arguments

str

a character vector

decreasing

a single logical value; should the sort order be nondecreasing (FALSE, default) or nonincreasing (TRUE)?

na_last

a single logical value; controls the treatment of NAs in str. If TRUE, then missing values in str are put at the end; if FALSE, they are put at the beginning; if NA, then they are removed from the output.

...

additional settings for opts_collator

opts_collator

a named list with ICU Collator's options as generated with stri_opts_collator, NULL for default collation options

Value

For stri_order, an integer vector that gives the sort order is returned.For stri_order, you get a sorted version of str, i.e. a character vector.

Details

For more information on ICU's Collator and how to tune it up in stringi, refer to stri_opts_collator.

These functions use a stable sort algorithm (STL's stable_sort), which performs up to $N*log^2(N)$ element comparisons, where $N$ is the length of str.

Interestingly, our benchmarks indicate that stri_order is most often faster that R's order.

References

Collation - ICU User Guide, http://userguide.icu-project.org/collation

See Also

Other locale_sensitive: %s<%< a="">, stri_compare, stri_count_boundaries, stri_duplicated, stri_enc_detect2, stri_extract_all_boundaries, stri_locate_all_boundaries, stri_opts_collator, stri_split_boundaries, stri_trans_tolower, stri_unique, stri_wrap, stringi-locale, stringi-search-boundaries, stringi-search-coll

Examples

stri_sort(c("hladny", "chladny"), locale="pl_PL")

stri_sort(c("hladny", "chladny"), locale="sk_SK")