R Observatory: Metrics for approxmatch version 2.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

approxmatch

2.0Package record

Approximately Optimal Fine Balance Matching with Multiple Groups

0packages depend

3.5Kdownloads / year

–test coverage

11/13flavors OK

Overview

About

Maintained by Bikram KarmakarCRAN page ↗

Tools for constructing a matched design with multiple comparison groups. Further specifications of refined covariate balance restriction and exact match on covariate can be imposed. Matches are approximately optimal in the sense that the cost of the solution is at most twice the optimal cost, Crama and Spieksma (1992) doi:10.1016/0377-2217(92)90078-N, Karmakar, Small and Rosenbaum (2019) doi:10.1080/10618600.2019.1584900.

Install

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

install.packages("approxmatch", 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-approxmatch

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-approxmatch

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-approxmatch

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: ‘Bikram Karmakar <bkarmakar@ufl.edu>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Bikram",
                    family = "Karmakar",
                    role = c("aut", "cre"),
                    email = "bkarmakar@ufl.edu")
as necessary.

CRAN check page ↗

Slowest check: 59 s · r-oldrel-windows-x86_64

Status changes

NOTE11 OK, 2 NOTE2026-09-08
ERROR10 OK, 2 NOTE, 1 ERROR2026-09-07
NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 2.0

READMENoVignettesNoNEWSNoCitation fileNoWebsitenot declared in DESCRIPTION

Help pages: 6includes a package overview page
Examples that run: 60%3 run in a plain check · 1 never run · 1 hold no code
Exported functions with examples: 75%
Documented parameters: not tracked
Return-value docs: not tracked
Help pages citing references: 100%

How these are measured

Downloads

3.5K

CRAN downloads in the past year

Rank #10,747 · ~10/day · ~289/mo

Releases R versions

Daily download trend is not available in this view yet.

33130 days

96490 days

3.5K1 year

Compare downloads with other packages →

Also on106 r2u31 autocran71 c2d4u

How downloads are counted

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

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

Depends (0)

none

Imports (0)

none

LinkingTo (0)

none

Suggests (2)

optmatchMASS

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (from the free-text Author field) (1)

Bikram Karmakar

Maintainer since 1.0 (2017)

Releases (2)

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
2.0Latest
record
2020-03-30 · current release · diff ↗
R
R 3.6.0 released · 2019-04-26
R
R 3.5.0 released · 2018-04-23
1.0
record
2017-11-05
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2017-11-05
Total releases: 2 / 9 yrs
License: MIT + file LICENSE OSI
Bundled data: 73 KB / 1 file
Download size: 92 KB

Appears in task views

Causal Inference

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("approxmatch")

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 approxmatch version 2.0 [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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