R Observatory: Metrics for R6 version 2.6.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

R6

2.6.1

Encapsulated Classes with Reference Semantics

711packages depend

20.9Mdownloads / year

–test coverage

12/13checks pass

Overview

About

Maintained by Winston ChangFirst published 2014-07-1717 releasesCRAN page ↗GitHub ↗

Creates classes with reference semantics, similar to R's built-in reference classes. Compared to reference classes, R6 classes are simpler and lighter-weight, and they are not built on S4 classes so they do not require the methods package. These classes allow public and private members, and they support inheritance, even when the classes are defined in different packages.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("R6", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("r-lib/R6")

Development version from r-lib/R6. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-r6

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-R6

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-R6

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

1ERROR12OK

Failing flavors

ERROR r-oldrel-macos-arm64

Slowest check: 1.2 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 2.22

not tracked

Coverage

100%

Documentation · exports

0

Dependencies · direct

Check history

ERROR2026-03-10
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE

Documentation

READMEYes · 272 wordsVignettesNopkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 50%
References docs: 0%

Downloads

20.9M

CRAN downloads in the past year

Rank #8 · ~57.1K/day · ~1.7M/mo

Releases R versions

Daily download trend is not available in this view yet.

2.1M30 days

5.7M90 days

20.9M1 year

Compare downloads with other packages →

Also on197.9K r2u108 autocran1.9M conda_forge3.8K c2d4u

Repository

GitHub ↗ r-lib/r6

425Stars

58Forks

53Open issues

3Open PRs

4Releases

601Commits

20Contributors

r

601 commits · Last activity 2025-10-20 · +0.2% stars, 30d

Stars over time

2025-07-14 · 4212026-07-19 · 425

Repository practices

Upstream repositoryBeta

5 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/r-lib/r6 on 2026-08-09.

Continuous integration (1)

GitHub Actions

Lint, format, editor (1)

RStudio project

Coverage (1)

Codecov

Governance and community (1)

CODEOWNERS

Show all practices

Git structural (1)

.gitattributes

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.6

Imports (0)

none

LinkingTo (0)

none

Suggests (2)

lobstr testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

711direct

11,244indirect

and 663 more packages.

Code & Tests

People & History

People (2)

Maintainer (1)

Winston Chang

Author, Maintainer

Authors (1)

Winston Chang

Author, Maintainer

Copyright holders (1)

Posit Software, PBC

Copyright holder, Funder · added in 2.6.0

Funders (1)

Posit Software, PBC

Copyright holder, Funder · added in 2.6.0

Package Timeline

17 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
2.6.1Latest
2025-02-15 · current release · diff ↗
2.6.0
2025-02-12 · diff ↗
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
2.5.1
2021-08-19 · diff ↗
R
R 4.1.0 released · 2021-05-18
2.5.0
2020-10-28 · diff ↗
R
R 4.0.0 released · 2020-04-24
2.4.1
2019-11-12 · diff ↗
R
R 3.6.0 released · 2019-04-26
2.4.0
2019-02-14 · diff ↗
2.3.0
2018-10-04 · diff ↗
R
R 3.5.0 released · 2018-04-23

Show 14 earlier events

2.2.2
2017-06-17 · diff ↗
2.2.1
2017-05-10 · diff ↗
R
R 3.4.0 released · 2017-04-21
2.2.0
2016-10-05 · diff ↗
2.1.3
2016-08-19 · diff ↗
R
R 3.3.0 released · 2016-05-03
2.1.2
2016-01-26 · diff ↗
2.1.1
2015-08-19 · diff ↗
2.1.0
2015-07-04 · diff ↗
R
R 3.2.0 released · 2015-04-16
2.0.1
2014-10-29 · diff ↗
2.0
2014-08-19 · diff ↗
1.0.1
2014-07-17
R
R 3.1.0 released · 2014-04-10

Package metadata

First published: 2014-07-17
Total releases: 17 / 12 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.6
Download size: 63 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Databases with R

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("R6")

Format

Chang, W., & Posit Software, PBC. (2025). R6: Encapsulated Classes with Reference Semantics (Version 2.6.1) [Computer software]. https://doi.org/10.32614/CRAN.package.R6

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for R6 version 2.6.1 [Data set]. HJJB, LLC. Data release v2026-08-15. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-15, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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