about_stringi: THE String Processing Package¶
stringi is THE R package for fast, correct, consistent, and convenient string/text manipulation. It gives predictable results on every platform, in each locale, and under any “native” character encoding.
Keywords: R, text processing, character strings, internationalization, localization, ICU, ICU4C, i18n, l10n, Unicode.
License: The BSD-3-clause license for the package code, the ICU license for the accompanying ICU4C distribution, and the UCD license for the Unicode Character Database. See the COPYRIGHTS and LICENSE file for more details.
Manual pages on general topics:
about_encoding – character encoding issues, including information on encoding management in stringi, as well as on encoding detection and conversion.
about_locale – locale issues, including locale management and specification in stringi, and the list of locale-sensitive operations. In particular, see stri_opts_collator for a description of the string collation algorithm, which is used for string comparing, ordering, sorting, case-folding, and searching.
about_arguments – information on how stringi treats its functions’ arguments.
Refer to the following:
about_search for string searching facilities; these include pattern searching, matching, string splitting, and so on. The following independent search engines are provided:
about_search_regex – with ICU (Java-like) regular expressions,
about_search_fixed – fast, locale-independent, byte-wise pattern matching,
about_search_coll – locale-aware pattern matching for natural language processing tasks,
about_search_charclass – seeking elements of particular character classes, like “all whites-paces” or “all digits”,
about_search_boundaries – text boundary analysis.
stri_datetime_format for date/time formatting and parsing. Also refer to the links therein for other date/time/time zone- related operations.
stri_length (among others) for determining the number of code points in a string. See also stri_count_boundaries for counting the number of Unicode characters and stri_width for approximating the width of a string.
stri_trim (among others) for trimming characters from the beginning or/and end of a string, see also about_search_charclass, and stri_pad for padding strings so that they are of the same width. Additionally, stri_wrap wraps text into lines.
stri_trans_tolower (among others) for case mapping, i.e., conversion to lower, UPPER, or Title Case, stri_trans_nfc (among others) for Unicode normalization, stri_trans_char for translating individual code points, and stri_trans_general for other universal yet powerful text transforms, including transliteration.
stri_split_lines (among others) to split a string into text lines.
stri_escape_unicode (among others) for escaping some code points.
Note that each man page provides many further links to other interesting facilities and topics.
stringi Package homepage, https://stringi.gagolewski.com/
ICU – International Components for Unicode, http://site.icu-project.org/
ICU4C API Documentation, https://unicode-org.github.io/icu-docs/apidoc/dev/icu4c/
The Unicode Consortium, https://home.unicode.org/
UTF-8, a transformation format of ISO 10646 – RFC 3629, https://tools.ietf.org/html/rfc3629