OpenML

1.12

Open Machine Learning and Open Data Platform

1packages depend

12.4Kdownloads / year

–test coverage

11/13checks pass

Overview

About

Maintained by Giuseppe CasalicchioFirst published 2016-11-1212 releasesCRAN page ↗GitHub ↗

We provide an R interface to 'OpenML.org' which is an online machine learning platform where researchers can access open data, download and upload data sets, share their machine learning tasks and experiments and organize them online to work and collaborate with other researchers. The R interface allows to query for data sets with specific properties, and allows the downloading and uploading of data sets, tasks, flows and runs. See https://www.openml.org/guide/api for more information.

Install

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

install.packages("OpenML", 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("openml/openml-r")

Development version from openml/openml-r. 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-openml

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-OpenML

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-OpenML

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

Health

CRAN checks

2NOTE11OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
NOTE r-devel-linux-x86_64-debian-gcc

Slowest check: 2.2 min · r-oldrel-windows-x86_64

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-03-10
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 99%
Return-value docs: 78%
References docs: 0%

Downloads

12.4K

CRAN downloads in the past year

Rank #5,955 · ~34/day · ~1K/mo

Releases R versions

Daily download trend is not available in this view yet.

51930 days

1.6K90 days

12.4K1 year

Compare downloads with other packages →

Also on111 r2u25 autocran97 c2d4u

Repository

GitHub ↗ openml/openml-r

99Stars

37Forks

23Open issues

1Open PRs

4Releases

1,381Commits

21Contributors

openmlcranrdatasetdatabasemachine-learningreproducible-researchopen-data

1,381 commits · Last activity 2024-06-03 · +1% stars, 30d

Stars over time

2025-06-18 · 982026-07-07 · 99

Repository practices

Upstream repositoryBeta

3 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/openml/openml-r on 2026-07-19.

Continuous integration (1)

GitHub Actions

Lint, format, editor (1)

EditorConfig

Coverage (1)

Codecov

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

Dependencies

Declared dependencies

22 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (12)

backports BBmisc checkmate data.table digest httr stringi XML jsonlite memoisestatscurl

LinkingTo (0)

none

Suggests (12)

testthat mlr ParamHelpers randomForestrpartRWeka xml2 farff knitr rmarkdown R.rsp rex

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

farff

Code & Tests

Code Composition

R 5,403 (40%)Other 4,291 (32%)Rd 3,371 (25%)Vignettes 457 (3%)

Code characteristics

Object systems

S326

Cyclomatic complexity: 2.0 median / 18 max

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

187 44 exported

Complexity

2.7 avg / 18 max

Call network

187 nodes / 283 edges

Call graph

Open call graph →

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Lowest coverage

Per-function coverage is not measured for this package yet.

People & History

People (0)

Author records are not tracked yet for this package.

Listed in earlier versions (8)

Bernd Bischl