If you're looking for a way to process character strings in R, you can use stringi. R supports a variety of character encodings, including UTF-8 and ASCII. You can even use R's character vector output. Using the character vector output mode, R silently re-encodes the string. This mode displays the results in the R console. The stringi function processes each string using Unicode, the superset of all character representation schemes. However, you can still use your native encoding as you process each string in R.

Another string manipulation function is str_match, which takes a vector of strings as an argument. It matches components within the given string by matching them to the pattern defined in parentheses. By default, Stringi supports both UTF-8 and ASCII strings. The following list of functions uses this feature. strr is the only library that supports all string manipulation operations. However, it has a limited set of functions. Here are some examples of stringr's basic functions.

stringi provides natural language processing functions and facilities for R developers. It is compatible with almost any character encoding and locale. It supports Java-like regular expressions, the Unicode collation algorithm, random string generation, case mapping, string transliteration, concatenation, padding, date-time formatting, and more. Because it uses the ICU library, stringi is portable and easy to use on any platform. There is a stringi GitHub repo for the package that explains how to use it to process character strings in R.