koRpus is an R package for text analysis. This includes, amongst others, a wrapper for the POS tagger TreeTagger, functions for automatic language detection, hyphenation, several indices of lexical diversity (e.g., type token ratio, HD-D/vocd-D, MTLD) and readability (e.g., Flesch, SMOG, LIX, Dale-Chall, Tuldava).

koRpus also includes a plugin for RKWard, a powerful GUI and IDE for R, providing graphical dialogs for its basic features. To make full use of this feature, please install RKWard (plugins are detected automatically).

More information on koRpus is available on the project homepage.


There are three easy ways of getting koRpus:

Stable releases via CRAN

The latest release that is considered stable for productive work can be found on the CRAN mirrors, which means you can install it from a running R session like this:


The CRAN packages are usually a bit behind the recent state of the package, and only updated after a significant amount of changes or important bug fixes.

Development releases via the project repository

Inbetween stable CRAN releases there’s usually several testing or development versions released on the project’s own repository. These releases should also work without problems, but they are also intended to test new features or supposed bug fixes, and get feedback before the next release goes to CRAN.

Installation is fairly easy, too:

install.packages("koRpus", repo=c(getOption("repos"), reaktanz="https://reaktanz.de/R"))

To automatically get updates, consider adding the repository to your R configuration. You might also want to subscribe to the package’s RSS feed to get notified of new releases.

If you’re running a Debian based operating system, you might be interested in the precompiled *.deb packages.

Installation via GitHub

To install it directly from GitHub, you can use install_github() from the devtools package:

devtools::install_github("unDocUMeantIt/koRpus") # stable release
devtools::install_github("unDocUMeantIt/koRpus", ref="develop") # development release

Installing language support

koRpus does not support any particular language out-of-the-box. Therefore, after installing the package you’ll have to also install at least one language support package to really make use of it. You can find these in the l10n repository, they’re called koRpus.lang.*.

The most straight forward way to get these packages is to use the function install.koRpus.lang(). Here’s an example how to install support for English and German:

install.koRpus.lang(lang=c("en", "de"))

There’s also precompiled Debian packages.


To ask for help, report bugs, suggest feature improvements, or discuss the global development of the package, please either subscribe to the koRpus-dev mailing list, or use the issue tracker on GitHub.


Please note that all development happens in the develop branch. Pull requests against the master branch will be rejected, as it is reserved for the current stable release.


Copyright 2012-2021 Meik Michalke meik.michalke@hhu.de

koRpus is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

koRpus is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with koRpus. If not, see https://www.gnu.org/licenses/.