R Observatory: Metrics for twosamples version 2.0.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

twosamples

2.0.1Package record

Fast Permutation Based Two Sample Tests

4packages dependsuggested by 3

114Kdownloads / year

81.0%test coverage

11/13flavors OK

Overview

About

Maintained by Connor DowdCRAN page ↗GitHub ↗Website ↗Issues ↗

Fast randomization based two sample tests. Testing the hypothesis that two samples come from the same distribution using randomization to create p-values. Included tests are: Kolmogorov-Smirnov, Kuiper, Cramer-von Mises, Anderson-Darling, Wasserstein, and DTS. The default test (two_sample) is based on the DTS test statistic, as it is the most powerful, and thus most useful to most users. The DTS test statistic builds on the Wasserstein distance by using a weighting scheme like that of Anderson-Darling. See the companion paper at arXiv:2007.01360 or https://codowd.com/public/DTS.pdf for details of that test statistic, and non-standard uses of the package (parallel for big N, weighted observations, one sample tests, etc). We also include the permutation scheme to make test building simple for others.

Changes in 2.0.1

This update contains two minor bugfixes.

1. Some of the unit tests use random numbers, one of those unit tests looking at

the function combine.twosamples failed to consider default (desired) behavior

for some possible values of those random numbers, and would occasionally fail.

This was a minor issue that would not negatively impact any users, _except_ that

it would occasionally cause a CRAN check to fail, which could cause trouble.

This update aims to fix the _test_, leaving all actual functionality unchanged,

so that there should not be further CRAN check failures from this issue.

2. Removed "C++11" from "System Requirements" -- as per current CRAN guidelines.

The presence of C++11 as a requirement caused a note for R-CMD-Check in R4.3.0 and up.

Currently, the lack of such a requirement does not affect compilation on any tested systems.

From NEWS.md in the release

Install

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

install.packages("twosamples", 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("cdowd/twosamples")

Development version from cdowd/twosamples. 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-twosamples

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-twosamples

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-twosamples

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

2NOTE11OK

Check messages

NOTECRAN incoming feasibilityr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc

Maintainer: ‘Connor Dowd <cd@codowd.com>’

The Description field contains
  that of Anderson-Darling. See the companion paper at <arXiv:2007.01360>
Please refer to arXiv e-prints via their arXiv DOI <doi:10.48550/arXiv.YYMM.NNNNN>.

CRAN check page ↗

Slowest check: 2.2 min · r-devel-windows-x86_64

Status changes

NOTE11 OK, 2 NOTENow
NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 2.0.1

READMEYes · 1,159 wordsVignettesNoNEWSYes · 100% structured · mentions 2.0.1Citation fileNoWebsiteYes · pkgdown

Help pages: 10
Examples that run: 100%9 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 0%

How these are measured

Downloads

114K

CRAN downloads in the past year

Rank #1,237 · ~312/day · ~9.5K/mo

Releases R versions

Daily download trend is not available in this view yet.

9.1K30 days

25.6K90 days

114K1 year

Compare downloads with other packages →

Also on1.4K r2u3 autocran3.2K conda_forge44 c2d4u

How downloads are counted

Repository

cdowd/twosamples ↗Account: cdowd

17Stars

2Forks

7Open issues

0Open PRs

6Releases

141Commits

2Commit identities

cranrdistance-metricecdf

141 commits · Last activity 2026-03-11

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 35
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-02-26 · 172026-07-07 · 17

How these are measured

PracticesBeta

8 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/cdowd/twosamples on 2026-10-22.

Continuous integration (2)

GitHub ActionsR CMD check workflow

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

Docs source (3)

README.Rmdpkgdown

GitHub Pages site last deployed 2026-03-11

pkgdown site last built 2023-06-21, before release 2.0.1 (2023-06-23)

CRAN release process (2)

cran-comments.mdrevdep/

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Installing twosamples adds 1 package (0 with compiled code, 298 KB of source tarballs). Heaviest: cpp11 298 KB.

Depends (0)

none

Imports (0)

none

LinkingTo (1)

cpp11

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

4direct

9indirect

Imports 4

Suggested by 3

Depends, Imports or LinkingTo, most downloaded first

opdisDownsampling CAST ieTest opImputation

Suggests, most downloaded first

mlr3spatiotempcv FRESA.CAD ksamplesLTRC

How these are counted

Code & Tests

People & History

People (1)

Connor Dowd

Author, Maintainer since 1.0.0 (2018)

Releases (6)

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
2.0.1Latest
record
2023-06-23 · current release · diff ↗
R
R 4.3.0 released · 2023-04-21
2.0.0
record
2022-07-12 · diff ↗ ·
removed 2 exports
order_stl, permutation_test_builder

added 1 export
combine.twosamples
1.2.0
record
2022-06-07 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
1.1.1
record
2020-07-19 · diff ↗
1.1.0
record
2020-07-14 · diff ↗ ·
removed 1 export
order_cpp

added 1 export
order_stl
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
1.0.0
record
2018-12-03
R
R 3.5.0 released · 2018-04-23

Package metadata

First published: 2018-12-03
Total releases: 6 / 8 yrs
License: GPL (>= 2) OSI
Download size: 132 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("twosamples")

Format

Dowd, C. (2023). twosamples: Fast Permutation Based Two Sample Tests (Version 2.0.1) [Computer software]. https://doi.org/10.32614/CRAN.package.twosamples

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 twosamples version 2.0.1 [Data set]. HJJB, LLC. Data release v2026-10-24. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-24, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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