Description
Efficient, object-oriented programming on the building blocks of machine learning. Provides 'R6' objects for tasks, learners, resamplings, and measures. The package is geared towards scalability and larger datasets by supporting parallelization and out-of-memory data-backends like databases. While 'mlr3' focuses on the core computational operations, add-on packages provide additional functionality.
Downloads
CRAN
33.2K
Last 30 days
624th
113.6K
Last 90 days
327.1K
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Trend: -16.2% (30d vs prior 30d)
r2u
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2.2K
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3.5K
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autoCRAN
3
Last 7 days
10
Last 30 days
0
All-time
autoCRAN-only: this name is served only by autoCRAN, so the count is exact.
CRAN Check Status
13
OK
Show all 13 flavors
| Flavor | Status |
|---|---|
| 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-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 13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Jun 9, 2026
ERROR 12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Jun 8, 2026
ERROR
r-devel-linux-x86_64-debian-gcc
Rd files
cannot open the connection prepare_Rd: cannot open file '/tmp/Rtmppc1580/Rf3a698b6f14ffca': No space left on device problem found in ‘mlr_learners_regr.featureless.Rd’
OK 14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Apr 8, 2026
NOTE 13 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026
NOTE
r-oldrel-macos-x86_64
installed package size
installed size is 5.0Mb
sub-directories of 1Mb or more:
R 2.0Mb
help 2.3Mb
Reverse Dependencies (59)
depends
imports
Dependency Network
Version History
53 tracked
new
1.5.0
Mar 10, 2026