R Observatory: Metrics for mlrCPO version 0.3.8

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

mlrCPO

0.3.8Package record

Composable Preprocessing Operators and Pipelines for Machine Learning

0packages depend

4.7Kdownloads / year

62.8%test coverage

11/13flavors OK

Overview

About

Maintained by Martin BinderCRAN page ↗GitHub ↗Issues ↗

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.

Changes in 0.3.8

Remove randomForestSRC_var.select filter, since it was removed from upstream.

From NEWS in the release

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. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

2NOTE11OK

Check messages

NOTERd contentsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc

Rd files without \usage:
  ‘CPOConstructor.Rd’
\arguments should not be documented without \usage.

CRAN check page ↗

Slowest check: 9.3 min · r-oldrel-windows-x86_64

Status changes

NOTE11 OK, 2 NOTE2026-08-06
ERROR10 OK, 2 NOTE, 1 ERROR2026-08-04
NOTE12 OK, 1 NOTE2026-07-11
OK12 OK, 1 FAILURE2026-06-08
ERROR12 OK, 1 ERROR2026-06-06

Show 1 earlier changeHide 1 earlier change

OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.3.8

READMEYes · 878 wordsVignettesYes · 8 · dynamicNEWSYes · 33% structured · mentions 0.3.8Citation fileNo

Help pages: 110 (2 internal)includes a package overview page
Examples that run: 100%9 run in a plain check
Exported functions with examples: 6%
Documented parameters: 99%
Return-value docs: 93%
Help pages citing references: 1%

Vignettes (8)

How these are measured

Downloads

4.7K

CRAN downloads in the past year

Rank #9,980 · ~13/day · ~393/mo

Releases R versions

Daily download trend is not available in this view yet.

43730 days

1K90 days

4.7K1 year

Compare downloads with other packages →

Also on81 r2u6 autocran

How downloads are counted

Repository

mlr-org/mlrcpo ↗Organization: mlr-org

36Stars

5Forks

46Open issues

1Open PRs

0Releases

1,449Commits

42Commit identities

1,449 commits · Last activity 2025-06-17 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 20
Median days to close, 50 most recently updated closed PRs: 1

Stars over time

2024-06-18 · 372026-07-15 · 36

How these are measured

PracticesBeta

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

Checks run against github.com/mlr-org/mlrcpo on 2026-10-21.

Continuous integration (1)

Travis CI (config file)

Governance and community (4)

Contributing guide (inherited from mlr-org)Issue templates

Funding links: GitHub Sponsors

The repository owner accepts GitHub Sponsors

Docs source (2)

pkgdown

GitHub Pages site last deployed 2020-04-27

Lint, format, editor (1)

EditorConfig

Show all practicesHide 1 practice

Git structural (1)

.gitattributes

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

27 external dependencies (excludes base and recommended)

Installing mlrCPO adds 27 packages (16 with compiled code, 35 MB of source tarballs). Heaviest: stringi 11 MB, ggplot2 6.0 MB, data.table 5.7 MB.

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.

How these are counted

Code & Tests

People & History

People (4)

Martin Binder

Author, Maintainer since 0.3.2 (2018)

Bernd Bischl

Contributor

Lars Kotthoff

Contributor

Michel Lang

Contributor

Releases (17)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
0.3.8Latest
record
2025-06-16 · current release · diff ↗ ·
removed 1 export
cpoFilterRfSRCMinDepth
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
0.3.7-7
record
2024-02-20 · diff ↗
R
R 4.3.0 released · 2023-04-21
0.3.7-6
record
2022-11-17 · diff ↗
0.3.7-5
record
2022-10-19 · diff ↗
0.3.7-4
record
2022-07-20 · diff ↗
R
R 4.2.0 released · 2022-04-22
0.3.7-3
record
2021-11-10 · diff ↗
R
R 4.1.0 released · 2021-05-18
0.3.7-2
record
2021-02-24 · diff ↗
0.3.7-1
record
2021-01-11 · diff ↗
0.3.7
record
2020-11-15 · diff ↗ ·
added 1 export
cpoDropMostlyConstants
R
R 4.0.0 released · 2020-04-24

Show 13 earlier eventsHide 13 earlier events

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

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("mlrCPO")

Format

Binder, M., Bischl, B., Kotthoff, L., & Lang, M. (2025). mlrCPO: Composable Preprocessing Operators and Pipelines for Machine Learning (Version 0.3.8) [Computer software]. https://doi.org/10.32614/CRAN.package.mlrCPO

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

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 mlrCPO version 0.3.8 [Data set]. HJJB, LLC. Data release v2026-10-23. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-23, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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