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https://github.com/gagolews/stringi

Fast and portable character string processing in R (with the Unicode ICU)
https://github.com/gagolews/stringi

icu icu4c natural-language-processing nlp r regex regexp string-manipulation stringi stringr text text-processing tidy-data unicode

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Fast and portable character string processing in R (with the Unicode ICU)

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# [**`stringi`**](https://stringi.gagolewski.com/)



### Fast and Portable Character String Processing in R (with the Unicode ICU)



![Build Status](https://github.com/gagolews/stringi/workflows/stringi%20for%20R/badge.svg)

![RStudio CRAN mirror downloads](http://cranlogs.r-pkg.org/badges/grand-total/stringi)

![RStudio CRAN mirror downloads](http://cranlogs.r-pkg.org/badges/last-month/stringi)

![RStudio CRAN mirror downloads](http://cranlogs.r-pkg.org/badges/last-day/stringi)



> A comprehensive tutorial and reference manual is available

> at .

>

> Check out [**`stringx`**](https://stringx.gagolewski.com/) for a set of wrappers

> around **`stringi`** with a base R-compatible API.

>

> To learn more about R, check out Marek's open-access (free!) textbook

> [Deep R Programming](https://deepr.gagolewski.com/).



**`stringi`**  (pronounced “stringy”, IPA [strinɡi])

is THE *R* package for string/text/natural language processing.

It is very fast, consistent, convenient, and — thanks to the

[ICU – International Components for Unicode](https://icu.unicode.org/)

library — portable across all locales and platforms.



Available features include:



* string concatenation, padding, wrapping,

* substring extraction,

* pattern searching (e.g., with Java-like regular expressions),

* collation and sorting,

* random string generation,

* case mapping and folding,

* string transliteration,

* Unicode normalisation,

* date-time formatting and parsing,



and many more.



**Package Maintainer**: [Marek Gagolewski](https://www.gagolewski.com/)



**Authors and Contributors**: [Marek Gagolewski](https://www.gagolewski.com/),

with contributions from Bartłomiej Tartanus and many others.



The package's API was inspired by that of the early (pre-tidyverse; v0.6.2)

version of Hadley Wickham's

[**`stringr`**](https://cran.r-project.org/web/packages/stringr/)

package (and since the 2015 v1.0.0 **`stringr`** is powered by **`stringi`**).



**Homepage**: https://stringi.gagolewski.com/



**Citation**: Gagolewski M.,

**`stringi`**: Fast and portable character string processing in R,

*Journal of Statistical Software*  **103**(2), 2022, 1–59,

.



**CRAN Entry**: https://CRAN.R-project.org/package=stringi



**System Requirements**: *R >= 3.4*, *ICU4C >= 61* (refer to the

[INSTALL](https://raw.githubusercontent.com/gagolews/stringi/master/INSTALL)

file for more details)



**License**: **`stringi`**'s source code is distributed under the open source

BSD-3-clause license. For more details, see

[LICENSE](https://raw.githubusercontent.com/gagolews/stringi/master/LICENSE).



This *git* repository also contains a custom subset of *ICU4C* source code which

is copyrighted by Unicode, Inc. and others. A binary version of the Unicode

Character Database is included. For more details on copyright holders, see

[LICENSE](https://raw.githubusercontent.com/gagolews/stringi/master/LICENSE).

The *ICU* project is covered by the

[Unicode license](https://github.com/unicode-org/icu/blob/main/icu4c/LICENSE) —

a simple, permissive non-copyleft free software license, compatible with

the GNU GPL. The *ICU* license

is [intended](https://unicode-org.github.io/icu/userguide/icu4c/faq.html)

to allow *ICU* to be included in free software projects as well as

in proprietary or commercial products.



**Changes**: see the

[NEWS](https://raw.githubusercontent.com/gagolews/stringi/master/NEWS) file.



[How to access the stringi C++ API from within an Rcpp-based R package](https://github.com/gagolews/ExampleRcppStringi)