R Observatory: Metrics for luz version 0.5.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

luz

0.5.2Package record

Higher Level 'API' for 'torch'

3packages dependsuggested by 5

36.3Kdownloads / year

0.0%test coverage

13/13flavors OK

Overview

About

Maintained by Tomasz KalinowskiCRAN page ↗GitHub ↗Website ↗Issues ↗

A high level interface for 'torch' providing utilities to reduce the the amount of code needed for common tasks, abstract away torch details and make the same code work on both the 'CPU' and 'GPU'. It's flexible enough to support expressing a large range of models. It's heavily inspired by 'fastai' by Howard et al. (2020) doi:10.48550/arXiv.2002.04688, 'Keras' by Chollet et al. (2015) and 'PyTorch Lightning' by Falcon et al. (2019) doi:10.5281/zenodo.3828935.

Changes in 0.5.2

New maintainer: Tomasz Kalinowski.
Switched CI GPU runners to ephemeral runs-on instances.
Bumped CI CUDA container to 12.8.1.
Fixed bugs in example vignettes (mnist-vae, text-generation).

From NEWS.md in the release

Install

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

install.packages("luz", 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("mlverse/luz")

Development version from mlverse/luz. 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-luz

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-luz

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-luz

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: 2.5 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.5.2

READMEYes · 235 wordsVignettesYes · 3 · dynamicNEWSYes · 100% structured · mentions 0.5.2Citation fileNoWebsiteYes · pkgdown

The repository also keeps web-only articles.

Help pages: 47 (2 internal)
Examples that run: 100%19 run in a plain check
Exported functions with examples: 44%
Documented parameters: 97%
Return-value docs: 57%
Help pages citing references: 2%

Vignettes (3)

How these are measured

Downloads

36.3K

CRAN downloads in the past year

Rank #2,668 · ~99/day · ~3K/mo

Releases R versions

Daily download trend is not available in this view yet.

1.7K30 days

5.6K90 days

36.3K1 year

Compare downloads with other packages →

Also on603 r2u6 autocran1.2K conda_forge

How downloads are counted

Repository

mlverse/luz ↗Organization: mlverse

101Stars

14Forks

15Open issues

3Open PRs

8Releases

567Commits

9Commit identities

567 commits · Last activity 2026-04-28 · 0% stars, 30d · Default branch at 0.5.2.9000, ahead of CRAN 0.5.2 (checked 2026-10-11)

Responsiveness

How these are sampled

PRs merged (all time): 96%
Median days to close, 50 most recently updated closed issues: 7
Median days to close, 50 most recently updated closed PRs: 1

Stars over time

2025-07-30 · 932026-07-07 · 101

How these are measured

PracticesBeta

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

Checks run against github.com/mlverse/luz on 2026-10-11.

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 (3)

pkgdown

GitHub Pages site last deployed 2026-04-28 · The repository has a site deploy workflow

pkgdown site last built 2026-04-28

Coverage (1)

Coverage reporting (Codecov)

CRAN release process (1)

cran-comments.md

Show all practicesHide 1 practice

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v3 (2026-09-26)

Dependencies

Declared dependencies

25 external dependencies (excludes base and recommended)

Installing luz adds 34 packages (15 with compiled code, 14 MB of source tarballs). Heaviest: torch 1.9 MB, Rcpp 1.8 MB, fs 1.4 MB.

Depends (0)

none

Imports (13)

torch magrittr zeallot rlang coro glue progress R6 generics purrr fs prettyunits cli

LinkingTo (0)

none

Suggests (12)

knitr rmarkdown testthat covr Metrics withr vdiffr ggplot2 dplyr torchvision tfevents (>= 0.0.2)tidyr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

3direct

0indirect

Imports 3

Suggested by 5

Depends, Imports or LinkingTo, most downloaded first

sits deepImp NNMoMo

Suggests, most downloaded first

bundle vetiver innsight genderBR nn2poly

How these are counted

Code & Tests

People & History

People (4)

Tomasz Kalinowski

Contributor, Maintainer since 0.5.2 (2026) · added in 0.5.2

Daniel Falbel

Author, Copyright holder

Christophe Regouby

Contributor · added in 0.5.0

RStudio

Copyright holder

Previously maintained by Daniel Falbel (0.1.0 to 0.5.1).

Releases (8)

Pick two releases to compare their code metrics.

0.5.2Latest
record
2026-04-28 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
0.5.1
record
2025-10-30 · diff ↗
0.5.0
record
2025-07-29 · diff ↗ ·
added 1 export
luz_callback_mixed_precision
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.4.0
record
2023-04-17 · diff ↗ ·
added 5 exports
luz_callback_auto_resume, luz_callback_resume_from_checkpoint, luz_callback_tfevents, luz_load_checkpoint, luz_metric_set
unarchivedReturned to CRAN
2022-09-06
0.3.1
record
2022-09-06 · diff ↗
archivedRemoved from CRAN
2022-09-05
issues were not corrected in time
0.3.0
record
2022-08-19 · diff ↗ ·
added 5 exports
luz_callback_gradient_clip, luz_callback_keep_best_model, luz_callback_mixup, nn_mixup_loss, nnf_mixup
R
R 4.2.0 released · 2022-04-22
0.2.0
record
2021-10-07 · diff ↗ ·
added 4 exports
as_dataloader, evaluate, get_metrics, lr_finder
0.1.0
record
2021-06-17
R
R 4.1.0 released · 2021-05-18

Package metadata

First published: 2021-06-17
Total releases: 8 / 5 yrs
License: MIT + file LICENSE OSI
Download size: 118 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("luz")

Format

Kalinowski, T., Falbel, D., RStudio, , & Regouby, C. (2026). luz: Higher Level 'API' for 'torch' (Version 0.5.2) [Computer software]. https://doi.org/10.32614/CRAN.package.luz

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 luz version 0.5.2 [Data set]. HJJB, LLC. Data release v2026-10-18. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-18, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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