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mlrCPO

Composable Preprocessing Operators and Pipelines for Machine Learning

v0.3.8 · Jun 16, 2025 · BSD_2_clause + file LICENSE
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Description

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.

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CRAN Check Status

14 OK
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r-devel-linux-x86_64-debian-clang OK
r-devel-linux-x86_64-debian-gcc OK
r-devel-linux-x86_64-fedora-clang OK
r-devel-linux-x86_64-fedora-gcc OK
r-devel-macos-arm64 OK
r-devel-windows-x86_64 OK
r-oldrel-macos-arm64 OK
r-oldrel-macos-x86_64 OK
r-oldrel-windows-x86_64 OK
r-patched-linux-x86_64 OK
r-release-linux-x86_64 OK
r-release-macos-arm64 OK
r-release-macos-x86_64 OK
r-release-windows-x86_64 OK

Check History

OK 14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026

Dependency Network

Dependencies Reverse dependencies ParamHelpers mlr BBmisc stringi checkmate backports mlrCPO

Version History

new 0.3.8 Mar 10, 2026
updated 0.3.8 ← 0.3.7-7 diff Jun 15, 2025
updated 0.3.7-7 ← 0.3.7-6 diff Feb 19, 2024
updated 0.3.7-6 ← 0.3.7-5 diff Nov 16, 2022
updated 0.3.7-5 ← 0.3.7-4 diff Oct 18, 2022
updated 0.3.7-4 ← 0.3.7-3 diff Jul 19, 2022
updated 0.3.7-3 ← 0.3.7-2 diff Nov 9, 2021
updated 0.3.7-2 ← 0.3.7-1 diff Feb 23, 2021
updated 0.3.7-1 ← 0.3.7 diff Jan 10, 2021
updated 0.3.7 ← 0.3.6 diff Nov 14, 2020
updated 0.3.6 ← 0.3.4-4 diff Apr 5, 2020
updated 0.3.4-4 ← 0.3.4-3 diff Aug 7, 2019
updated 0.3.4-3 ← 0.3.4-2 diff May 10, 2019
updated 0.3.4-2 ← 0.3.4-1 diff Jan 9, 2019
updated 0.3.4-1 ← 0.3.4 diff Oct 1, 2018
updated 0.3.4 ← 0.3.3 diff Jul 2, 2018
updated 0.3.3 ← 0.3.2 diff Apr 20, 2018
new 0.3.2 Apr 4, 2018