R Observatory: Metrics for assertthat version 0.2.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

assertthat

0.2.1Package record

Easy Pre and Post Assertions

353packages dependsuggested by 7

2.7Mdownloads / year

81.6%test coverage

13/13flavors OK

Overview

About

Maintained by Hadley WickhamCRAN page ↗

An extension to stopifnot() that makes it easy to declare the pre and post conditions that you code should satisfy, while also producing friendly error messages so that your users know what's gone wrong.

Install

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

install.packages("assertthat", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

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-assertthat

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-assertthat

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-assertthat

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: 54 s · 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
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.2.1

READMEYes · 397 wordsVignettesNoNEWSNoCitation fileNoWebsitenot declared in DESCRIPTION

Help pages: 11
Examples that run: 100%11 run in a plain check
Exported functions with examples: 100%
Documented parameters: 91%
Return-value docs: 9%
Help pages citing references: 0%

How these are measured

Downloads

2.7M

CRAN downloads in the past year

Rank #249 · ~7.4K/day · ~223.6K/mo

Releases R versions

Daily download trend is not available in this view yet.

174K30 days

513.7K90 days

2.7M1 year

Compare downloads with other packages →

Also on46.5K r2u149 autocran1.5M conda_forge506 c2d4u

How downloads are counted

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Installing assertthat adds no packages beyond those that come with R.

Depends (0)

none

Imports (1)

tools

LinkingTo (0)

none

Suggests (2)

testthat covr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

353direct

350indirect

Depends 2 · Imports 351

Suggested by 7

Show the 48 most downloaded dependentsHide the 48 most downloaded dependents

Depends, Imports or LinkingTo, most downloaded first

and 305 more dependents and 7 packages that suggest it on CRAN ↗

How these are counted

Code & Tests

People & History

People (1)

Hadley Wickham

Author, Maintainer

Maintainer since 0.1 (2013)

Releases (3)

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
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
0.2.1Latest
record
2019-03-21 · current release · diff ↗
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
0.2.0
record
2017-04-11 · diff ↗
R
R 3.3.0 released · 2016-05-03
R
R 3.2.0 released · 2015-04-16
R
R 3.1.0 released · 2014-04-10
0.1
record
2013-12-06

Show 1 earlier eventHide 1 earlier event

R
R 3.0.0 released · 2013-04-03

Package metadata

First published: 2013-12-06
Total releases: 3 / 13 yrs
License: GPL-3 OSI
Download size: 12 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("assertthat")

Format

Wickham, H. (2019). assertthat: Easy Pre and Post Assertions (Version 0.2.1) [Computer software]. https://doi.org/10.32614/CRAN.package.assertthat

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 assertthat version 0.2.1 [Data set]. HJJB, LLC. Data release v2026-10-22. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-22, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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