R Observatory: Metrics for arcopt version 0.3.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

arcopt

0.3.0Package record

Adaptive Regularization using Cubics for Optimization

0packages depend

2.1Kdownloads / year

80.0%test coverage

13/13flavors OK

Overview

About

Maintained by Marcus WaldmanCRAN page ↗GitHub ↗Issues ↗

Implements cubic regularization methods (ARC) for local optimization problems common in statistics and applied research. Provides robust handling of ill-conditioned, nonconvex, and indefinite Hessian problems with automatic saddle point escape. Supports box constraints; linear equality constraints are planned for a future release.

Changes in 0.3.0

This is the first CRAN release of **arcopt**. The headline feature is

the tri-modal solver shipped in v0.2.0 (cubic / trust-region fallback /

quasi-Newton polish), wrapped with the tiered control surface

documented under ?arcopt (Tier 1) and ?arcopt_advanced_controls

(Tier 2). See the v0.2.0 entry below for the full feature description.

Other changes since v0.2.0

Cubic solver now reuses its eigendecomposition at end-of-iteration detector checks, removing redundant work and trimming roughly 0.3% of total runtime on large-scale benchmarks.
Added benchmarking and profiling scaffolding under benchmarks/ for identifying C++ port candidates. Excluded from the package build; available in the GitHub source tree.

From NEWS.md in the release

Install

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

install.packages("arcopt", 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("marcus-waldman/arcopt")

Development version from marcus-waldman/arcopt. 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-arcopt

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-arcopt

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-arcopt

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: 2.9 min · r-devel-windows-x86_64

Status changes

OK13 OK2026-09-08
ERROR12 OK, 1 ERROR2026-09-07
OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK7 OK2026-04-30

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.3.0

READMEYes · 846 wordsVignettesYes · 2 · dynamicNEWSYes · 100% structured · mentions 0.3.0Citation fileYes · cites a publication

Help pages: 30 (28 internal)includes a package overview page
Examples that run: 0%1 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 100%
Documented parameters: 78%
Return-value docs: 100%
Help pages citing references: 13%

Vignettes (2)

How these are measured

Downloads

2.1K

CRAN downloads in the past year

Rank #11,740 · ~6/day · ~171/mo

Releases R versions

Daily download trend is not available in this view yet.

32930 days

91990 days

2.1K1 year

Compare downloads with other packages →

Also on137 r2u34 autocran

How downloads are counted

Repository

marcus-waldman/arcopt ↗Account: marcus-waldman

0Stars

0Forks

1Open issues

0Open PRs

0Releases

Last activity 2026-04-28

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: not measured
Median days to close, 50 most recently updated closed PRs: not measured

How these are measured

PracticesBeta

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

Checks run against github.com/marcus-waldman/arcopt on 2026-10-18.

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

Coverage (1)

Coverage reporting

CRAN release process (1)

cran-comments.md

Show all practicesHide 1 practice

Lint, format, editor (3)

lintrLint workflowRStudio project

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

AI coding toolsBeta

This repository shows signs of AI coding tools.

Claude Codefirst seen 2026-01-03
Seen in the repository: CLAUDE.md
Named in .Rbuildignore: .claude, CLAUDE.md
Named in .gitignore: .claude
Pull request it wrote: opened by a project member
Commits: at least 46 crediting it in the message

Models named in its commits

Claude Opus 4.718 commits · Apr 2026
Claude Opus 4.512 commits · Jan 2026
Claude Sonnet 4.58 commits · Jan 2026
Claude Haiku 4.54 commits · Jan 2026
Claude Sonnet 4.64 commits · Apr 2026

Counts are commits, not lines of code. Commits by a tool's accounts count once across all of its accounts. Commits crediting it are the largest count among its credit lines, a minimum.How this is detected·Detection ruleset v4 (updated 2026-09-27)

Dependencies

Declared dependencies

8 external dependencies (excludes base and recommended)

Installing arcopt adds 1 package (1 with compiled code, 1.8 MB of source tarballs). Heaviest: Rcpp 1.8 MB.

Depends (1)

R >= 4.1.0

Imports (2)

Rcpputils

LinkingTo (1)

Rcpp

Suggests (6)

testthat knitr rmarkdown covr marqLevAlg trust

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (1)

Marcus Waldman

Author, Maintainer since 0.3.0 (2026)

Releases (1)

0.3.0Latest
record
2026-04-29 · current release
R
R 4.6.0 released · 2026-04-24

Package metadata

First published: 2026-04-29
Total releases: 1 / 1 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 4.1.0
Download size: 110 KB

Cite

Cite this package

Run in R for the authors' entry:

citation("arcopt")

The package provides a citation file, so citation() returns the authors' own entry.

It points to 10.1007/s10107-009-0286-5.

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 arcopt version 0.3.0 [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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