R Observatory: Metrics for rchemo version 0.1-4

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

rchemo

0.1-4Package record

Dimension Reduction, Regression and Discrimination for Chemometrics

0packages depend

3.5Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Marion Brandolini-BunlonCRAN page ↗GitHub ↗

Data exploration and prediction with focus on high dimensional data and chemometrics. The package was initially designed about partial least squares regression and discrimination models and variants, in particular locally weighted PLS models (LWPLS). Then, it has been expanded to many other methods for analyzing high dimensional data. The name 'rchemo' comes from the fact that the package is orientated to chemometrics, but most of the provided methods are fully generic to other domains. Functions such as transform(), predict(), coef() and summary() are available. Tuning the predictive models is facilitated by generic functions gridscore() (validation dataset) and gridcv() (cross-validation). Faster versions are also available for models based on latent variables (LVs) (gridscorelv() and gridcvlv()) and ridge regularization (gridscorelb() and gridcvlb()).

Changes in 0.1-4

New functions : consensuspca, covsellm, covselrda, covsellda, covselqda
Function changes : "Xscaling" and "Yscaling" arguments added to covsel instead of "scaly"
bugfix : R/lda.R; R/qda.R; R/r2.R
New vignettes : mbplsda, soplsda
New data : Zhang2023

From inst/NEWS.md in the release

Install

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

install.packages("rchemo", 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("ChemHouse-group/rchemo")

Development version from ChemHouse-group/rchemo. 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-rchemo

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-rchemo

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-rchemo

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: 4.3 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK12 OK, 1 FAILURE2026-06-08
ERROR12 OK, 1 ERROR2026-06-07
OK12 OK2026-04-25

Show 1 earlier changeHide 1 earlier change

NOTE11 OK, 3 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1-4

READMEYes · 330 wordsVignettesYes · 2 · dynamicNEWSYes · 100% structured · mentions 0.1-4Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 90
Examples that run: 99%89 run in a plain check · 1 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 100%
Documented parameters: not tracked
Return-value docs: not tracked
Help pages citing references: 43%

Vignettes (2)

How these are measured

Downloads

3.5K

CRAN downloads in the past year

Rank #6,701 · ~10/day · ~296/mo

Releases R versions

Daily download trend is not available in this view yet.

50230 days

1.3K90 days

3.5K1 year

Compare downloads with other packages →

Also on116 r2u3 autocran

How downloads are counted

Repository

chemhouse-group/rchemo ↗Organization: ChemHouse-group

4Stars

2Forks

0Open issues

0Open PRs

0Releases

153Commits

2Commit identities

153 commits · Last activity 2026-06-28 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 97%
Median days to close, 50 most recently updated closed issues: not measured
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2024-10-02 · 32026-08-28 · 4

How these are measured

PracticesBeta

3 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/chemhouse-group/rchemo on 2026-10-18.

Continuous integration (1)

GitLab CI

CRAN release process (1)

cran-comments.md

Git structural (1)

.gitattributes

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

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Installing rchemo adds 5 packages (5 with compiled code, 8.0 MB of source tarballs). Heaviest: data.table 5.7 MB, signal 1.9 MB, e1071 311 KB.

Depends (1)

R >= 4.0

Imports (8)

statsgraphicsgrDevicesdata.table FNN signal e1071utils

LinkingTo (0)

none

Suggests (2)

knitr rmarkdown

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)

Marion Brandolini-Bunlon

Author, Maintainer since 0.1-1 (2023)

Benoit Jaillais

Author

Matthieu Lesnoff

Author

Jean-Michel Roger

Author

Releases (4)

Pick two releases to compare their code metrics.

0.1-4Latest
record
2026-06-30 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
0.1-3
record
2024-09-11 · diff ↗
0.1-2
record
2024-06-05 · diff ↗
R
R 4.4.0 released · 2024-04-24
0.1-1
record
2023-05-12
R
R 4.3.0 released · 2023-04-21

Package metadata

First published: 2023-05-12
Total releases: 4 / 3 yrs
License: GPL-3 OSI
Minimum R: ≥ 4.0
Bundled data: 3.3 MB / 6 files
Download size: 5.4 MB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("rchemo")

Format

Brandolini-Bunlon, M., Jaillais, B., Lesnoff, M., & Roger, J. (2026). rchemo: Dimension Reduction, Regression and Discrimination for Chemometrics (Version 0.1-4) [Computer software]. https://doi.org/10.32614/CRAN.package.rchemo

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 rchemo version 0.1-4 [Data set]. HJJB, LLC. Data release v2026-10-21. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-21, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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