R Observatory: Metrics for POSSA version 0.6.5

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

POSSA

0.6.5Package record

Power Simulation for Sequential Analyses and Multiple Hypotheses

0packages depend

2.6Kdownloads / year

49.0%test coverage

13/13flavors OK

Overview

About

Maintained by Gáspár LukácsCRAN page ↗GitHub ↗

Calculates, via simulation, power and appropriate stopping alpha boundaries (and/or futility bounds) for sequential analyses (i.e., group sequential design) as well as for multiple hypotheses (multiple tests included in an analysis), given any specified global error rate. This enables the sequential use of practically any significance test, as long as the underlying data can be simulated in advance to a reasonable approximation. Lukács (2022) doi:10.21105/joss.04643.

Install

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

install.packages("POSSA", 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("gasparl/possa")

Development version from gasparl/possa. 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-possa

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-POSSA

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-POSSA

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: 2.4 min · r-oldrel-macos-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 0.6.5

READMEYes · 341 wordsVignettesYes · 4 · dynamicNEWSNoCitation fileNo

Description cites a JOSS paper

Help pages: 7 (1 internal)includes a package overview page
Examples that run: 100%3 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (4)

How these are measured

Downloads

2.6K

CRAN downloads in the past year

Rank #21,028 · ~7/day · ~216/mo

Releases R versions

Daily download trend is not available in this view yet.

27330 days

62790 days

2.6K1 year

Compare downloads with other packages →

Also on68 r2u7 autocran

How downloads are counted

Repository

gasparl/possa ↗Account: gasparl

1Stars

1Forks

6Open issues

0Open PRs

5Releases

120Commits

2Commit identities

multiple-testingrr-pkgsequential-analysessequential-designstatistical-analysis

120 commits · Last activity 2025-08-21

Responsiveness

How these are sampled

PRs merged (all time): not measured
Median days to close, 50 most recently updated closed issues: 0
Median days to close, 50 most recently updated closed PRs: not measured

Stars over time

2022-05-14 · 12026-07-07 · 1

How these are measured

PracticesBeta

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

Checks run against github.com/gasparl/possa on 2026-10-18.

Continuous integration (2)

GitHub ActionsR CMD check workflow

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

Governance and community (1)

Contributing guide

Docs source (1)

GitHub Pages site last deployed 2025-08-21

Coverage (1)

Coverage reporting

Show all practicesHide 1 practice

CRAN release process (1)

CRAN-SUBMISSION

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

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Installing POSSA adds 1 package (1 with compiled code, 5.7 MB of source tarballs). Heaviest: data.table 5.7 MB.

Depends (1)

R >= 3.6.0

Imports (2)

data.tablemethods

LinkingTo (0)

none

Suggests (4)

testthat knitr rmarkdown faux

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (1)

Gáspár Lukács

Author, Maintainer since 0.5.5 (2022)

Releases (5)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
0.6.5Latest
record
2025-08-21 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
0.6.4
record
2023-04-22 · diff ↗
R
R 4.3.0 released · 2023-04-21
0.6.3
record
2023-03-14 · diff ↗
0.6.1
record
2022-08-29 · diff ↗ ·
added 1 export
get_p
0.5.5
record
2022-07-18
R
R 4.2.0 released · 2022-04-22

Package metadata

First published: 2022-07-18
Total releases: 5 / 4 yrs
License: BSD_2_clause + file LICENSE OSI
Minimum R: ≥ 3.6.0
Download size: 158 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("POSSA")

Format

Lukács, G. (2025). POSSA: Power Simulation for Sequential Analyses and Multiple Hypotheses (Version 0.6.5) [Computer software]. https://doi.org/10.32614/CRAN.package.POSSA

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 POSSA version 0.6.5 [Data set]. HJJB, LLC. Data release v2026-10-21. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-21, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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