R Observatory: Metrics for learner version 1.0.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

learner

1.0.0Package record

Latent Space-Based Transfer Learning

0packages depend

2.6Kdownloads / year

91.9%test coverage

13/13flavors OK

Overview

About

Maintained by Sean McGrathCRAN page ↗GitHub ↗Issues ↗

Implements transfer learning methods for low-rank matrix estimation. These methods leverage similarity in the latent row and column spaces between the source and target populations to improve estimation in the target population. The methods include the LatEnt spAce-based tRaNsfer lEaRning (LEARNER) method and the direct projection LEARNER (D-LEARNER) method described by McGrath et al. (2024) doi:10.48550/arXiv.2412.20605.

Changes in 1.0.0

Re-implemented most of learner and cv.learner in Rcpp, resulting in significant speed-ups
Re-ordered matrix computations in dlearner, resulting in significant speed-ups for large matrices
Fixed a bug in cv.learner when Y_target has missing entries
Expanded unit testing

From NEWS.md in the release

Install

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

install.packages("learner", 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("stmcg/learner")

Development version from stmcg/learner. 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-learner

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-learner

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-learner

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

13OK

CRAN check page ↗

Slowest check: 3.5 min · r-devel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-07-15
ERROR12 OK, 1 ERROR2026-07-13
OK13 OK2026-06-18

Show 11 earlier changesHide 11 earlier changes

ERROR12 OK, 1 ERROR2026-06-16
OK13 OK2026-06-04
ERROR12 OK, 1 ERROR2026-06-01
OK13 OK2026-05-19
ERROR12 OK, 1 ERROR2026-05-18
OK12 OK2026-04-25
NOTE12 OK, 2 NOTE2026-04-22
ERROR11 OK, 2 NOTE, 1 ERROR2026-04-18
NOTE12 OK, 2 NOTE2026-04-11
ERROR11 OK, 2 NOTE, 1 ERROR2026-04-08
NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.0.0

READMEYes · 376 wordsVignettesNoNEWSYes · 100% structured · mentions 1.0.0Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 5
Examples that run: 100%3 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 60%

How these are measured

Downloads

2.6K

CRAN downloads in the past year

Rank #16,684 · ~7/day · ~214/mo

Releases R versions

Daily download trend is not available in this view yet.

26930 days

76090 days

2.6K1 year

Compare downloads with other packages →

Also on399 r2u4 autocran

How downloads are counted

Repository

stmcg/learner ↗Account: stmcg

2Stars

1Forks

0Open issues

0Open PRs

0Releases

61Commits

3Commit identities

61 commits · Last activity 2026-10-24 · +100% stars, 30d · Default branch at 1.1.0, ahead of CRAN 1.0.0 (checked 2026-10-21)

Responsiveness

How these are sampled

PRs merged (all time): 71%
Median days to close, 50 most recently updated closed issues: not measured
Median days to close, 50 most recently updated closed PRs: 3

Stars over time

2025-01-10 · 12026-10-07 · 2

How these are measured

PracticesBeta

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

Checks run against github.com/stmcg/learner on 2026-10-21.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Docs source (1)

README.Rmd

Coverage (1)

Coverage reporting

Reproducibility and dev environment (1)

data-raw/

Show all practicesHide 1 practice

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Installing learner adds 3 packages (2 with compiled code, 3.5 MB of source tarballs). Heaviest: Rcpp 1.8 MB, RcppEigen 1.7 MB, ScreeNOT 4.2 KB.

Depends (1)

R >= 2.10

Imports (3)

ScreeNOT Rcpp RcppEigen

LinkingTo (2)

Rcpp RcppEigen

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (4)

Sean McGrath

Author, Maintainer since 0.1.0 (2025)

Rui Duan

Author

Ryan ODea

Author · added in 1.0.0

Cenhao Zhu

Author

Releases (2)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
1.0.0Latest
record
2025-03-03 · current release · diff ↗
0.1.0
record
2025-01-08
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2025-01-08
Total releases: 2 / 1 yrs
License: GPL (>= 3) OSI
Minimum R: ≥ 2.10
Bundled data: 304 KB / 2 files
Download size: 321 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("learner")

Format

McGrath, S., Duan, R., ODea, R., & Zhu, C. (2025). learner: Latent Space-Based Transfer Learning (Version 1.0.0) [Computer software]. https://doi.org/10.32614/CRAN.package.learner

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 learner version 1.0.0 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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