R Observatory: Metrics for detectseparation version 0.4.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

detectseparation

0.4.0Package record

Detect and Check for Separation and Infinite Maximum Likelihood Estimates

3packages dependsuggested by 5

50Kdownloads / year

89.3%test coverage

8/13flavors OK

Overview

About

Maintained by Ioannis KosmidisCRAN page ↗GitHub ↗Issues ↗

Provides pre-fit and post-fit methods for detecting separation and infinite maximum likelihood estimates in generalized linear models with categorical responses. The pre-fit methods apply on binomial-response generalized liner models such as logit, probit and cloglog regression, and can be directly supplied as fitting methods to the glm() function. They solve the linear programming problems for the detection of separation developed in Konis (2007, https://ora.ox.ac.uk/objects/uuid:8f9ee0d0-d78e-4101-9ab4-f9cbceed2a2a) using 'ROI' https://cran.r-project.org/package=ROI or 'lpSolveAPI' https://cran.r-project.org/package=lpSolveAPI. The post-fit methods apply to models with categorical responses, including binomial-response generalized linear models and multinomial-response models, such as baseline category logits and adjacent category logits models; for example, the models implemented in the 'brglm2' https://cran.r-project.org/package=brglm2 package. The post-fit methods successively refit the model with increasing number of iteratively reweighted least squares iterations, and monitor the ratio of the estimated standard error for each parameter to what it has been in the first iteration. According to the results in Lesaffre & Albert (1989, https://www.jstor.org/stable/2345845), divergence of those ratios indicates data separation.

Install

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

install.packages("detectseparation", 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("ikosmidis/detectseparation")

Development version from ikosmidis/detectseparation. 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-detectseparation

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-detectseparation

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-detectseparation

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

5NOTE8OK

Check messages

NOTER code for possible problemsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-devel-windows-x86_64

Found calls to structure() using deprecated special names:
  detectseparation/R/detect_infinite_estimates.R (.Names: 1)
'.Names' should be changed to 'names'.

CRAN check page ↗

Slowest check: 1.6 min · r-oldrel-windows-x86_64

Status changes

NOTE8 OK, 5 NOTENow
NOTE11 OK, 2 NOTE2026-07-16
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.4.0

READMEYes · 902 wordsVignettesYes · 2 · dynamicNEWSYes · 100% structured · does not mention 0.4.0Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 9includes a package overview page
Examples that run: 100%4 run in a plain check
Exported functions with examples: 75%
Documented parameters: 100%
Return-value docs: 50%
Help pages citing references: 67%

Vignettes (2)

How these are measured

Downloads

50K

CRAN downloads in the past year

Rank #1,698 · ~137/day · ~4.2K/mo

Releases R versions

Daily download trend is not available in this view yet.

5K30 days

12.6K90 days

50K1 year

Compare downloads with other packages →

Also on437 r2u15 autocran1.2K conda_forge

How downloads are counted

Repository

ikosmidis/detectseparation ↗Account: ikosmidis

7Stars

1Forks

3Open issues

0Open PRs

4Releases

195Commits

5Commit identities

195 commits · Last activity 2026-04-29 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 92%
Median days to close, 50 most recently updated closed issues: 18
Median days to close, 50 most recently updated closed PRs: 3

Stars over time

2025-03-14 · 72026-07-07 · 7

How these are measured

PracticesBeta

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

Checks run against github.com/ikosmidis/detectseparation 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 (1)

README.Rmd

Coverage (1)

Coverage reporting (Codecov)

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

14 external dependencies (excludes base and recommended)

Installing detectseparation adds 21 packages (10 with compiled code, 4.9 MB of source tarballs). Heaviest: fs 1.4 MB, rlang 766 KB, cli 629 KB.

Depends (1)

R >= 3.3.0

Imports (4)

ROI ROI.plugin.lpsolve lpSolveAPI pkgload

LinkingTo (0)

none

Suggests (10)

knitr rmarkdown covr brglm2 AER tinytest ROI.plugin.ecos ROI.plugin.glpk ROI.plugin.alabama ROI.plugin.neos

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

3direct

0indirect

Depends 1 · Imports 2

Suggested by 5

Depends, Imports or LinkingTo, most downloaded first

corncob plotor metadeconfoundR

Suggests, most downloaded first

brglm2 drmTMB mlumr gp3bayes divoRce

How these are counted

Code & Tests

Datasets

People & History

People (4)

Ioannis Kosmidis

Author, Maintainer since 0.1 (2020)

Dirk Schumacher

Author

Florian Schwendinger

Author · added in 0.3

Kjell Konis

Contributor

Releases (4)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
0.4.0Latest
record
2026-04-19 · 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
0.3
record
2022-08-26 · diff ↗ ·
added 2 exports
detectInfiniteEstimates, detect_infinite_estimates
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
0.2
record
2021-04-22 · diff ↗
R
R 4.0.0 released · 2020-04-24
0.1
record
2020-03-25
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2020-03-25
Total releases: 4 / 6 yrs
License: GPL-3 OSI
Minimum R: ≥ 3.3.0
Bundled data: 1.2 KB / 3 files
Download size: 107 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("detectseparation")

Format

Kosmidis, I., Konis, K., Schumacher, D., & Schwendinger, F. (2026). detectseparation: Detect and Check for Separation and Infinite Maximum Likelihood Estimates (Version 0.4.0) [Computer software]. https://doi.org/10.32614/CRAN.package.detectseparation

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 detectseparation version 0.4.0 [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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