R Observatory: Metrics for PWEXP version 0.5.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

PWEXP

0.5.1Package record

Piecewise Exponential Distribution Prediction Model

0packages dependsuggested by 2

3.8Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Tianchen XuCRAN page ↗GitHub ↗Issues ↗

Build piecewise exponential survival model for study design (planning) and event/timeline prediction.

Changes in 0.5.1

move 'fastmatch' from Depends to Imports in DESCRIPTION

From inst/NEWS.Rd in the release

Install

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

install.packages("PWEXP", 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("zjph602xtc/PWEXP")

Development version from zjph602xtc/PWEXP. 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-pwexp

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-PWEXP

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-PWEXP

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: 2.6 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-09-08
ERROR12 OK, 1 ERROR2026-09-07
OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-05-13

Show 1 earlier changeHide 1 earlier change

NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.5.1

READMEYes · 9 wordsVignettesYes · 1 · dynamicNEWSYes · mentions 0.5.1Citation fileNo

Help pages: 11
Examples that run: 100%11 run in a plain check
Exported functions with examples: 100%
Documented parameters: 90%
Return-value docs: 100%
Help pages citing references: 9%

Vignettes (1)

Theory Notes

How these are measured

Downloads

3.8K

CRAN downloads in the past year

Rank #8,812 · ~11/day · ~321/mo

Releases R versions

Daily download trend is not available in this view yet.

36030 days

1.1K90 days

3.8K1 year

Compare downloads with other packages →

Also on78 r2u10 autocran

How downloads are counted

Repository

zjph602xtc/pwexp ↗Account: zjph602xtc

1Stars

0Forks

1Open issues

0Open PRs

0Releases

53Commits

1Commit identities

53 commits · Last activity 2026-03-26 · 0% stars, 30d

Responsiveness

not measured

Stars over time

2023-09-01 · 12026-07-07 · 1

How these are measured

PracticesBeta

3 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/zjph602xtc/pwexp on 2026-10-18.

Docs source (1)

GitHub Pages site last deployed 2026-05-07

Lint, format, editor (1)

RStudio project

Git structural (1)

.gitattributes

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

Dependencies

Declared dependencies

7 external dependencies (excludes base and recommended)

Installing PWEXP adds 6 packages (1 with compiled code, 743 KB of source tarballs). Heaviest: segmented 316 KB, iterators 293 KB, foreach 88 KB.

Depends (1)

survival

Imports (10)

graphicsgrDevicesstatsmethodsutilssegmented foreach doSNOWparallelfastmatch

LinkingTo (0)

none

Suggests (3)

knitr RColorBrewer rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Suggested by 2

Suggests, most downloaded first

TrialSimulator ROCsurvcomp

How these are counted

Code & Tests

People & History

People (2)

Tianchen Xu

Author, Maintainer since 0.3.0 (2023)

Wen Zhang

Author · added in 0.5.1

Releases (7)

Pick two releases to compare their code metrics.

0.5.1Latest
record
2026-05-09 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
0.5.0
record
2024-03-12 · diff ↗ ·
added 2 exports
predict.pwexp.fit, predict.boot.pwexp.fit
0.4.4
record
2024-02-01 · diff ↗
0.4.3
record
2023-12-17 · diff ↗
0.4.2
record
2023-12-07 · diff ↗
0.4.1
record
2023-09-14 · diff ↗
0.3.0
record
2023-07-05
R
R 4.3.0 released · 2023-04-21

Package metadata

First published: 2023-07-05
Total releases: 7 / 3 yrs
License: MIT + file LICENSE OSI
Download size: 601 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("PWEXP")

Format

Xu, T., & Zhang, W. (2026). PWEXP: Piecewise Exponential Distribution Prediction Model (Version 0.5.1) [Computer software]. https://doi.org/10.32614/CRAN.package.PWEXP

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 PWEXP version 0.5.1 [Data set]. HJJB, LLC. Data release v2026-10-20. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-20, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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