mlrCPO

0.3.8

Composable Preprocessing Operators and Pipelines for Machine Learning

0packages depend

5.8Kdownloads / year

62.8%test coverage

11/13checks pass

Overview

About

Maintained by Martin BinderFirst published 2018-04-0517 releasesCRAN page ↗GitHub ↗

Toolset that enriches 'mlr' with a diverse set of preprocessing operators. Composable Preprocessing Operators ("CPO"s) are first-class R objects that can be applied to data.frames and 'mlr' "Task"s to modify data, can be attached to 'mlr' "Learner"s to add preprocessing to machine learning algorithms, and can be composed to form preprocessing pipelines.

Install

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

install.packages("mlrCPO", 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("mlr-org/mlrCPO")

Development version from mlr-org/mlrCPO. 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-mlrcpo

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-mlrCPO

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-mlrCPO

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: 12.1 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 0.83

62.8%

Coverage · measured lines

91%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-07-11
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-06-08
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 1 FAILURE
ERROR2026-06-06
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 878 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 99%
Return-value docs: 93%
References docs: 1%

Downloads

5.8K

CRAN downloads in the past year

Rank #10,806 · ~16/day · ~485/mo

Releases R versions

Daily download trend is not available in this view yet.

30830 days

99390 days

5.8K1 year

Compare downloads with other packages →

Also on124 r2u35 autocran

Repository

GitHub ↗ mlr-org/mlrcpo

36Stars

4Forks

46Open issues

1Open PRs

0Releases

1,449Commits

42Contributors

1,449 commits · Last activity 2025-06-17 · -2.7% stars, 30d

Stars over time

2024-06-18 · 372026-07-15 · 36

Repository practices

Upstream repositoryBeta

4 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/mlr-org/mlrcpo on 2026-07-19.

Continuous integration (1)

Travis CI

Lint, format, editor (1)

EditorConfig

Governance and community (1)

Issue templates

Git structural (1)

.gitattributes

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

Dependencies

Declared dependencies

27 external dependencies (excludes base and recommended)

Depends (3)

R >= 3.0.2ParamHelpers mlr

Imports (7)

BBmisc stringi checkmatemethodsstatsutilsbackports

LinkingTo (0)

none

Suggests (22)

care partyrpartmlbench knitr rmarkdown testthat mRMRe digest praznik randomForestSRC randomForest ranger Rfast FSelector FSelectorRcpp e1071 FNN lintr Hmisc fastICA rex

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (4)

Maintainer (1)

Martin Binder

Author, Maintainer

Authors (1)

Martin Binder

Author, Maintainer

Contributors (3)

Bernd Bischl

Contributor

Lars Kotthoff

Contributor

Michel Lang

Contributor

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
0.3.8Latest
2025-06-16 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
0.3.7-7
2024-02-20 · diff ↗
R
R 4.3.0 released · 2023-04-21
0.3.7-6
2022-11-17 · diff ↗
0.3.7-5
2022-10-19 · diff ↗
0.3.7-4
2022-07-20 · diff ↗
R
R 4.2.0 released · 2022-04-22
0.3.7-3
2021-11-10 · diff ↗
R
R 4.1.0 released · 2021-05-18
0.3.7-2
2021-02-24 · diff ↗
0.3.7-1
2021-01-11 · diff ↗
0.3.7
2020-11-15 · diff ↗
R
R 4.0.0 released · 2020-04-24

Show 13 earlier events

0.3.6
2020-04-06 · diff ↗
0.3.4-4
2019-08-08 · diff ↗
0.3.4-3
2019-05-11 · diff ↗
R
R 3.6.0 released · 2019-04-26
0.3.4-2
2019-01-10 · diff ↗
0.3.4-1
2018-10-02 · diff ↗
0.3.4
2018-07-03 · diff ↗
R
R 3.5.0 released · 2018-04-23
0.3.3
2018-04-21 · diff ↗
unarchivedReturned to CRAN
2018-04-21
archivedRemoved from CRAN
2018-04-20
check errors were not corrected despite reminder Uses Suggests packages unconditionally
0.3.2
2018-04-05
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2018-04-05
Total releases: 17 / 8 yrs
License: BSD_2_clause + file LICENSE OSI
Minimum R: ≥ 3.0.2
Download size: 538 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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