R Observatory: Metrics for invgamma version 1.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

invgamma

1.2Package record

The Inverse Gamma Distribution

20packages dependsuggested by 5

120Kdownloads / year

75.6%test coverage

13/13flavors OK

Overview

About

Maintained by David KahleCRAN page ↗GitHub ↗Website ↗Issues ↗

Light weight implementation of the standard distribution functions for the inverse gamma distribution, wrapping those for the gamma distribution in the stats package.

Changes in 1.2

New features

**invgamma** has an updated README containing a simulation check on rinvgamma().

Changes

rinvgamma() now warns for shape less than 0.01, as it is unreliable there.
rinvchisq() now warns for df <= .01 and ncp <= 10, as it is unreliable there.
PDF functions now return 0 at x = 0 and -Inf at x = 0 on a log scale, consistent with the gamma distribution functions.
**invgamma** now cautions users about the parameterizations used in (d/p/q/r)invgamma() functions.
**invgamma** now has a MIT license.
Quantile functions now perform properly on a log scale, thanks to Keefe Murphy!

From NEWS.md in the release

Install

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

install.packages("invgamma", 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("dkahle/invgamma")

Development version from dkahle/invgamma. 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-invgamma

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-invgamma

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-invgamma

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: 54 s · r-devel-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 1.2

READMEYes · 916 wordsVignettesNoNEWSYes · 100% structured · mentions 1.2Citation fileNoWebsiteYes · pkgdown

Help pages: 3
Examples that run: 100%3 run in a plain check
Exported functions with examples: 100%
Documented parameters: 45%
Return-value docs: 0%
Help pages citing references: 0%

How these are measured

Downloads

120K

CRAN downloads in the past year

Rank #1,133 · ~329/day · ~10K/mo

Releases R versions

Daily download trend is not available in this view yet.

10.2K30 days

31.3K90 days

120K1 year

Compare downloads with other packages →

Also on1.4K r2u171 autocran84.3K conda_forge179 c2d4u

How downloads are counted

Repository

dkahle/invgamma ↗Account: dkahle

4Stars

2Forks

2Open issues

0Open PRs

1Releases

56Commits

1Commit identities

56 commits · Last activity 2025-08-25 · Default branch at 1.2.900, ahead of CRAN 1.2 (checked 2026-10-18)

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 2
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2023-08-19 · 42026-07-07 · 4

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/dkahle/invgamma on 2026-10-18.

Continuous integration (1)

GitHub Actions

Docs source (4)

README.Rmdpkgdown

GitHub Pages site last deployed 2025-08-25 · The repository has a site deploy workflow

Coverage (1)

Coverage reporting

CRAN release process (1)

revdep/

Show all practicesHide 1 practice

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

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

Depends (0)

none

Imports (0)

none

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

20direct

10indirect

Imports 20

Suggested by 5

Show all 25 packagesHide all 25 packages

Depends, Imports or LinkingTo, most downloaded first

ashr bqror dwp BayesFBHborrow bartcs GCPBayes carfima DTEBOP2 TruncExpFam rregm ComBatFamQC RaCE.NMA OBASpatial bayespm ExGaussEstim catalytic ERPeq spDBL voigt survregVB

Suggests, most downloaded first

Ecfun DTAT telescope RepeatedHighDim mvpd

How these are counted

Code & Tests

People & History

People (2)

David Kahle

James Stamey

Author, Copyright holder

Releases (4)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
1.2Latest
record
2025-07-02 · current release · diff ↗
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
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
1.1
record
2017-05-07 · diff ↗
R
R 3.4.0 released · 2017-04-21
1.0
record
2016-07-02 · diff ↗ ·
added 8 exports
dinvchisq, dinvexp, pinvchisq, pinvexp, qinvchisq, qinvexp, rinvchisq, rinvexp
0.0
record
2016-06-24
R
R 3.3.0 released · 2016-05-03

Package metadata

First published: 2016-06-24
Total releases: 4 / 10 yrs
License: MIT + file LICENSE OSI · relicensed from GPL-2 in 1.2
Download size: 2.5 MB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("invgamma")

Format

Kahle, D., & Stamey, J. (2025). invgamma: The Inverse Gamma Distribution (Version 1.2) [Computer software]. https://doi.org/10.32614/CRAN.package.invgamma

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 invgamma version 1.2 [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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