R Observatory: Metrics for longpower version 1.0.27

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

longpower

1.0.27Package record

Sample Size Calculations for Longitudinal Data

0packages depend

11.4Kdownloads / year

83.5%test coverage

13/13flavors OK

Overview

About

Maintained by Michael C. DonohueCRAN page ↗GitHub ↗

Compute power and sample size for linear models of longitudinal data. Supported models include mixed-effects models and models fit by generalized least squares and generalized estimating equations. The package is described in Iddi and Donohue (2022) DOI:10.32614/RJ-2022-022. Relevant formulas are derived by Liu and Liang (1997) DOI:10.2307/2533554, Diggle et al (2002) <ISBN:9780199676750>, and Lu, Luo, and Chen (2008) DOI:10.2202/1557-4679.1098.

Install

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

install.packages("longpower", 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("mcdonohue/longpower")

Development version from mcdonohue/longpower. 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-longpower

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-longpower

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-longpower

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: 2.2 min · r-oldrel-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 1.0.27

README· In the repository, left out of the releaseVignettesYes · 1 · dynamicNEWSNoCitation fileYes · cites a publication

Cites an R Journal article

Help pages: 11 (1 internal)includes a package overview page
Examples that run: 100%8 run in a plain check
Exported functions with examples: 89%
Documented parameters: 99%
Return-value docs: 89%
Help pages citing references: 73%

Vignettes (1)

Power for linear models of longitudinal data with applications to Alzheimer's Disease Phase II study design HTML

How these are measured

Downloads

11.4K

CRAN downloads in the past year

Rank #4,247 · ~31/day · ~954/mo

Releases R versions

Daily download trend is not available in this view yet.

68730 days

2.1K90 days

11.4K1 year

Compare downloads with other packages →

Also on149 r2u6 autocran130 c2d4u

How downloads are counted

Repository

mcdonohue/longpower ↗Account: mcdonohue

5Stars

5Forks

4Open issues

0Open PRs

0Releases

84Commits

5Commit identities

84 commits · Last activity 2024-09-04 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 75%
Median days to close, 50 most recently updated closed issues: not measured
Median days to close, 50 most recently updated closed PRs: 1

Stars over time

2025-02-11 · 22026-08-22 · 5

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/mcdonohue/longpower on 2026-10-21.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Coverage (1)

Coverage reporting

CRAN release process (1)

cran-comments.md

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Installing longpower adds 8 packages (6 with compiled code, 11 MB of source tarballs). Heaviest: lme4 4.3 MB, nloptr 2.1 MB, Rcpp 1.8 MB.

Depends (3)

R >= 3.0.0lme4nlme

Imports (1)

methods

LinkingTo (0)

none

Suggests (4)

gee testthat knitr rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (3)

Michael C. Donohue

Author, Maintainer since 1.0-1 (2010)

Steve D. Edland

Contributor

Nan Hu

Contributor · added in 1.0.24

Listed in earlier versions (4)

Show 4 peopleHide 4 people

Steven D. Edland

no longer listed · 1.0-1 to 1.0-16.1

Anthony C. Gamst

no longer listed · 1.0-1 to 1.0-16.1

Michael C.

no longer listed · 1.0-21 to 1.0.27

Steve D.

no longer listed · 1.0-21 to 1.0.27

Releases (19)

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
1.0.27Latest
record
2024-09-05 · current release · diff ↗ ·
added 1 export
cprm.power
1.0.26
record
2024-08-27 · diff ↗
R
R 4.4.0 released · 2024-04-24
1.0.25
record
2024-01-24 · diff ↗
R
R 4.3.0 released · 2023-04-21
1.0.24
record
2023-01-11 · diff ↗ ·
added 1 export
hu.mackey.thomas.linear.power
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
1.0.23
record
2021-04-20 · diff ↗
R
R 4.0.0 released · 2020-04-24
1.0-21
record
2020-04-22 · diff ↗ ·
removed 5 exports
lmmpower.double, lmmpower.numeric, lmmpower.default, lmmpower.gee, lmmpower.lme
R
R 3.6.0 released · 2019-04-26
unarchivedReturned to CRAN
2019-03-07
1.0-19
record
2019-03-07 · diff ↗ ·
added 1 export
lmmpower.double

Show 24 earlier eventsHide 24 earlier events

archivedRemoved from CRAN
2019-02-19
check problems were not corrected in time
1.0-16.1
record
2018-09-11 · diff ↗
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
1.0-16
record
2016-07-25 · diff ↗
1.0-15
record
2016-05-18 · diff ↗ ·
removed 1 export
pattern:^[[:alpha:]]+

added 4 exports
edland.linear.power, lmmpower, lmmpower.numeric, power.longtest
R
R 3.3.0 released · 2016-05-03
R
R 3.2.0 released · 2015-04-16
1.0-11
record
2015-01-16 · diff ↗
R
R 3.1.0 released · 2014-04-10
1.0-10
record
2013-09-21 · diff ↗
1.0-9
record
2013-06-17 · diff ↗
1.0-8
record
2013-05-28 · diff ↗
1.0-7
record
2013-05-22 · diff ↗
R
R 3.0.0 released · 2013-04-03
1.0-4
record
2013-01-23 · diff ↗
1.0-3
record
2013-01-11 · diff ↗ ·
added 2 exports
power.mmrm, power.mmrm.ar1
1.0-2
record
2012-05-31 · diff ↗
R
R 2.15.0 released · 2012-03-30
R
R 2.14.0 released · 2011-10-31
R
R 2.13.0 released · 2011-04-13
R
R 2.12.0 released · 2010-10-15
1.0-1
record
2010-09-01
R
R 2.11.0 released · 2010-04-22

Package metadata

First published: 2010-09-01
Total releases: 19 / 16 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.0.0
Download size: 52 KB

Appears in task views

Clinical Trial Design, Monitoring, Analysis and Reporting Mixed, Multilevel, and Hierarchical Models in R

Cite

Cite this package

Run in R for the authors' entry:

citation("longpower")

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

It points to 10.32614/rj-2022-022.

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 longpower version 1.0.27 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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