Conway-Maxwell Poisson (COM-Poisson) Regression
Overview
Fit Conway-Maxwell Poisson (COM-Poisson or CMP) regression models to count data (Sellers & Shmueli, 2010) doi:10.1214/09-AOAS306. The package provides functions for model estimation, dispersion testing, and diagnostics. Zero-inflated CMP regression (Sellers & Raim, 2016) doi:10.1016/j.csda.2016.01.007 is also supported.
- Added
NEWS.mdfile to log changes to the package. - Update Roxygen comments to address CRAN check NOTES.
From NEWS.md in the release
Install
Health
- OK13 OK2026-08-05
- NOTE12 OK, 1 NOTE2026-08-01
- OK13 OK2026-07-25
- NOTE11 OK, 2 NOTE2026-07-23
- ERROR10 OK, 2 NOTE, 1 ERROR2026-07-16
Show 2 earlier changesHide 2 earlier changes
- NOTE10 OK, 2 NOTE2026-04-25
- ERROR11 OK, 2 NOTE, 1 ERROR2026-03-10
Documentation
- Help pages
- 22includes a package overview page
- Examples that run
- no examples
- Exported functions with examples
- 0%
- Documented parameters
- 99%
- Return-value docs
- 100%
- Help pages citing references
- 27%
- COMPoissonReg PDF
Downloads
Repository
- PRs merged (all time)
- 100%
- Median days to close, 50 most recently updated closed issues
- 20
- Median days to close, 50 most recently updated closed PRs
- 0
Issues over time
Commits over time
1 development-tooling and community-health practice detected across 1 family in the upstream repository
Checks run against github.com/lotze/compoissonreg on 2026-10-21.
Dependencies
Installing COMPoissonReg adds 2 packages (1 with compiled code, 1.9 MB of source tarballs). Heaviest: Rcpp 1.8 MB, numDeriv 74 KB.
Code & Tests
Datasets
People & History
Maintainer since 0.4.0 (2017), previously Thomas Lotze (0.1.1 to 0.3.5)
Pick two releases to compare their code metrics.
- 0.8.2Latest
- RR 4.6.0 released · 2026-04-24
- RR 4.5.0 released · 2025-04-11
- RR 4.4.0 released · 2024-04-24
- 0.8.12023-11-29 · diff ↗
- RR 4.3.0 released · 2023-04-21
- 0.8.02022-12-02 · diff ↗ ·
added 21 exports
dzip, ecmp, ezicmp, ezip, get.control, get.fixed, get.init, get.init.zero, get.modelmatrix, get.offset, get.offset.zero, glm.cmp.raw, glm.zicmp.raw, ncmp, pzip, qzip, rzip, tcmp, vcmp, vzicmp, vzip - RR 4.2.0 released · 2022-04-22
- RR 4.1.0 released · 2021-05-18
- RR 4.0.0 released · 2020-04-24
- 0.7.0
- RR 3.6.0 released · 2019-04-26
- 0.6.12018-12-09 · diff ↗
- 0.6.02018-12-02 · diff ↗
- RR 3.5.0 released · 2018-04-23
- 0.4.12017-05-03 · diff ↗
Show 17 earlier eventsHide 17 earlier events
- RR 3.4.0 released · 2017-04-21
- 0.4.02017-04-19 · diff ↗ ·
removed 12 exports
cmp, chisq, pval, chisq.cmp, parametric_bootstrap.cmp, nu.cmp, sdev.cmp, pval.cmp, leverage.cmp, deviance.cmp, predict.cmp, residuals.cmpadded 10 exports
equitest, glm.cmp, dcmp, rcmp, pcmp, qcmp, rzicmp, dzicmp, pzicmp, qzicmp - RR 3.3.0 released · 2016-05-03
- 0.3.52015-07-11 · diff ↗ ·
removed 10 exports
CMP.MSE, CMPParamBoot, CMPStdErrors, ComputeBetasAndNuHat, ComputeBetasAndlogNuHat, constantCMPfitsandresids, CMPDeviance, CMPLeverage, LRT, makeCMPdata - RR 3.2.0 released · 2015-04-16
- RR 3.1.0 released · 2014-04-10
- RR 3.0.0 released · 2013-04-03
- RR 2.15.0 released · 2012-03-30
- RR 2.14.0 released · 2011-10-31
- 0.3.42011-05-11 · diff ↗
- 0.3.32011-04-28 · diff ↗
- RR 2.13.0 released · 2011-04-13
- 0.3.22011-02-10 · diff ↗ ·
removed 1 export
ComputeBetasAndlogNuHatadded 16 exports
cmp, chisq, pval, chisq.cmp, sdev, nu, parametric_bootstrap, parametric_bootstrap.cmp, nu.cmp, sdev.cmp, pval.cmp, leverage.cmp, deviance.cmp, predict.cmp, residuals.cmp, CMPLeverage - 0.2.1
- RR 2.12.0 released · 2010-10-15
- 0.1.12010-05-25
- RR 2.11.0 released · 2010-04-22
Package metadata
- First published
- 2010-05-25
- Total releases
- 14 / 16 yrs
- License
- GPL-2 | GPL-3 OSI
- Bundled data
- 1.5 KB / 2 files
- Download size
- 419 KB
Cite
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