This man page explains how to perform string search-based operations in stringi.
Marek Gagolewski and other contributors
The following independent string searching engines are available in stringi.
stri_*_regex -- ICU's regular expressions (regexes),
see about_search_regex,
stri_*_fixed -- locale-independent byte-wise pattern matching,
see about_search_fixed,
stri_*_coll -- ICU's StringSearch,
locale-sensitive, Collator-based pattern search,
useful for natural language processing tasks,
see about_search_coll,
stri_*_charclass -- character classes search,
e.g., Unicode General Categories or Binary Properties,
see about_search_charclass,
stri_*_boundaries -- text boundary analysis,
see about_search_boundaries
Each search engine is able to perform many search-based operations. These may include:
stri_detect_* - detect if a pattern occurs in a string,
see, e.g., stri_detect,
stri_count_* - count the number of pattern occurrences,
see, e.g., stri_count,
stri_locate_* - locate all, first, or last occurrences
of a pattern, see, e.g., stri_locate,
stri_extract_* - extract all, first, or last occurrences
of a pattern, see, e.g., stri_extract
and, in case of regexes, stri_match,
stri_replace_* - replace all, first, or last occurrences
of a pattern, see, e.g., stri_replace
and also stri_trim,
stri_split_* - split a string into chunks indicated
by occurrences of a pattern,
see, e.g., stri_split,
stri_startswith_* and stri_endswith_* detect
if a string starts or ends with a pattern match, see,
e.g., stri_startswith,
stri_subset_* - return a subset of a character vector
with strings that match a given pattern, see, e.g., stri_subset.
The official online manual of stringi at https://stringi.gagolewski.com/
Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, tools:::Rd_expr_doi("10.18637/jss.v103.i02")
Other text_boundaries:
about_search_boundaries,
stri_count_boundaries(),
stri_extract_all_boundaries(),
stri_locate_all_boundaries(),
stri_opts_brkiter(),
stri_split_boundaries(),
stri_split_lines(),
stri_trans_tolower(),
stri_wrap()
Other search_regex:
about_search_regex,
stri_opts_regex()
Other search_fixed:
about_search_fixed,
stri_opts_fixed()
Other search_coll:
about_search_coll,
stri_opts_collator()
Other search_charclass:
about_search_charclass,
stri_trim_both()
Other search_detect:
stri_detect(),
stri_startswith()
Other search_count:
stri_count_boundaries(),
stri_count()
Other search_locate:
stri_locate_all_boundaries(),
stri_locate_all()
Other search_replace:
stri_replace_all(),
stri_replace_rstr(),
stri_trim_both()
Other search_split:
stri_split_boundaries(),
stri_split_lines(),
stri_split()
Other search_subset:
stri_subset()
Other search_extract:
stri_extract_all_boundaries(),
stri_extract_all(),
stri_match_all()
Other stringi_general_topics:
about_arguments,
about_encoding,
about_locale,
about_search_boundaries,
about_search_charclass,
about_search_coll,
about_search_fixed,
about_search_regex,
about_stringi