R Observatory: Metrics for skellam version 0.2.4

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

skellam

0.2.4Package record

Densities and Sampling for the Skellam Distribution

1packages dependsuggested by 3

34.6Kdownloads / year

45.7%test coverage

13/13flavors OK

Overview

About

Maintained by Montasser GhachemCRAN page ↗GitHub ↗

Functions for the Skellam distribution, including: density (pmf), cdf, quantiles and regression.

Changes in 0.2.4

---

New Features and Improvements

Added a comprehensive README.md with usage examples, installation instructions, and badges (e.g., CRAN status, license).
Improved the **vignette** (validate_skellam.Rmd) with clearer explanations, reproducible examples, and better visualizations.

Documentation Updates

Revised documentation for skellam.reg to clarify parameter definitions, return values, and included practical examples.

Internal Changes

Updated vignette-building dependencies (now requires rmarkdown and knitr).
Minor fixes to ensure compatibility with R CMD check across all tested platforms (see cran-results.md).

---

From NEWS.md in the release

Install

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

install.packages("skellam", 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("monty-se/skellam")

Development version from monty-se/skellam. 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-skellam

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-skellam

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-skellam

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: 1.7 min · r-oldrel-macos-x86_64

Status changes

OK13 OK2026-08-04
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.2.4

READMEYes · 366 wordsVignettesYes · 1 · dynamicNEWSYes · 67% structured · mentions 0.2.4Citation fileYes · computed when R runs itWebsitenot declared in DESCRIPTION

Help pages: 3
Examples that run: 100%3 run in a plain check
Exported functions with examples: 100%
Documented parameters: 78%
Return-value docs: 100%
Help pages citing references: 100%

Vignettes (1)

The Skellam Distribution HTML

How these are measured

Downloads

34.6K

CRAN downloads in the past year

Rank #2,368 · ~95/day · ~2.9K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.7K30 days

7K90 days

34.6K1 year

Compare downloads with other packages →

Also on136 r2u3 autocran1.5K conda_forge241 bioconda141 c2d4u

How downloads are counted

Repository

monty-se/skellam ↗Account: monty-se

2Stars

0Forks

0Open issues

0Open PRs

0Releases

7Commits

1Commit identities

count-dataestimationinferencemaximum-likelihood-estimationprobability-distributionrandom-samplingregressionstatistical-modeling

7 commits · Last activity 2025-04-05 · 0% stars, 30d

Responsiveness

not measured

Stars over time

2025-05-13 · 12026-07-07 · 2

How these are measured

PracticesBeta

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

Checks run against github.com/monty-se/skellam on 2026-10-18.

Continuous integration (1)

GitHub Actions

CRAN release process (2)

cran-comments.mdCRAN-SUBMISSION

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Installing skellam adds no packages beyond those that come with R.

Depends (0)

none

Imports (1)

stats

LinkingTo (0)

none

Suggests (2)

knitr rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

Imports 1

Suggested by 3

Depends, Imports or LinkingTo, most downloaded first

PINstimation

Suggests, most downloaded first

extraDistr fitteR CCd

How these are counted

Code & Tests

People & History

People (4)

Montasser Ghachem

Maintainer since 0.2.4 (2025) · added in 0.2.4

Patrick E. Brown

Author · added in 0.1

Jerry W. Lewis

Author

Michail Tsagris

Author · added in 0.2.0

Previously maintained by Patrick E. Brown (0.1 to 0.2.3) and Jerry W. Lewis (0.0-8-7).

Listed in earlier versions (2)

Brown

no longer listed · 0.2.4

Lewis

no longer listed · 0.2.4

Releases (6)

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
0.2.4Latest
record
2025-04-07 · current release · diff ↗
R
R 4.4.0 released · 2024-04-24
0.2.3
record
2024-03-25 · diff ↗
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
0.2.0
record
2016-12-15 · diff ↗ ·
removed 1 export
pattern:.

added 8 exports
dskellam, dskellam.sp, pskellam, pskellam.sp, qskellam, rskellam, skellam.mle, skellam.reg
R
R 3.3.0 released · 2016-05-03
0.1.3
record
2015-07-07 · diff ↗
0.1
record
2015-06-23 · diff ↗

Show 5 earlier eventsHide 5 earlier events

R
R 3.2.0 released · 2015-04-16
R
R 3.1.0 released · 2014-04-10
R
R 3.0.0 released · 2013-04-03
0.0-8-7
record
2012-10-29
R
R 2.15.0 released · 2012-03-30

Package metadata

First published: 2012-10-29
Total releases: 6 / 14 yrs
License: GPL (>= 2) OSI
Download size: 39 KB

Appears in task views

Probability Distributions

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("skellam")

The package provides a citation file that builds its entry when R runs it. Run citation() to see it.

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 skellam version 0.2.4 [Data set]. HJJB, LLC. Data release v2026-10-22. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-22, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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