cem

1.1.31

Coarsened Exact Matching

2packages depend

53Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Stefano M. IacusFirst published 2008-08-2026 releasesCRAN page ↗

Implementation of the Coarsened Exact Matching algorithm discussed along with its properties in Iacus, King, Porro (2011) DOI:10.1198/jasa.2011.tm09599; Iacus, King, Porro (2012) DOI:10.1093/pan/mpr013 and Iacus, King, Porro (2019) DOI:10.1017/pan.2018.29.

Install

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

install.packages("cem", 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-cem

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# 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-cem

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 2.6 min · r-devel-linux-x86_64-fedora-clang

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-04-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-09
13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 100 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 21%
Documented parameters: 100%
Return-value docs: 100%
References docs: 90%

Downloads

53K

CRAN downloads in the past year

Rank #2,067 · ~145/day · ~4.4K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.3K30 days

11.5K90 days

53K1 year

Compare downloads with other packages →

Also on294 r2u26 autocran37 c2d4u

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Depends (2)

tcltklattice

Imports (4)

MatchIt combinat randomForestnlme

LinkingTo (0)

none

Suggests (1)

Amelia

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

2direct

0indirect

mwa cobalt

Code & Tests

Datasets

People & History

People (4)

Maintainer (1)

Stefano M. Iacus

Author, Maintainer · added in 1.1.8

Authors (4)

Stefano M. Iacus

Author, Maintainer · added in 1.1.8

Gary King

Author · added in 1.1.8

Richard Nielsen

Author · added in 1.1.27

Giuseppe Porro

Author · added in 1.1.8

Listed in earlier versions (7)

Stefano Iacus Gary King <king@harvard.edu> Giuseppe Porro <giuseppe.porro@unimi.it>

no longer listed · 1.0.39 to 1.0.142

Gary