Last chance! 50% off unlimited learning
Sale ends in
This function returns a character vector like str,
but with duplicate elements removed.
stri_unique(str, ..., opts_collator = NULL)a character vector
additional settings for opts_collator
a named list with ICU Collator's options,
see stri_opts_collator, NULL
for default collation options
Returns a character vector.
As usual in stringi, no attributes are copied.
Unlike unique, this function
tests for canonical equivalence of strings (and not
whether the strings are just bytewise equal). Such an operation
is locale-dependent. Hence, stri_unique is significantly
slower (but much better suited for natural language processing)
than its base R counterpart.
See also stri_duplicated for indicating non-unique elements.
Collation - ICU User Guide, https://unicode-org.github.io/icu/userguide/collation/
The official online manual of stringi at https://stringi.gagolewski.com/
Other locale_sensitive:
%s<%(),
about_locale,
about_search_boundaries,
about_search_coll,
stri_compare(),
stri_count_boundaries(),
stri_duplicated(),
stri_enc_detect2(),
stri_extract_all_boundaries(),
stri_locate_all_boundaries(),
stri_opts_collator(),
stri_order(),
stri_rank(),
stri_sort_key(),
stri_sort(),
stri_split_boundaries(),
stri_trans_tolower(),
stri_wrap()
# NOT RUN {
# normalized and non-Unicode-normalized version of the same code point:
stri_unique(c('\u0105', stri_trans_nfkd('\u0105')))
unique(c('\u0105', stri_trans_nfkd('\u0105')))
stri_unique(c('gro\u00df', 'GROSS', 'Gro\u00df', 'Gross'), strength=1)
# }
Run the code above in your browser using DataLab