MatchIt

4.7.2

Nonparametric Preprocessing for Parametric Causal Inference

37packages depend

288.7Kdownloads / year

–test coverage

11/13checks pass

Overview

About

Maintained by Noah GreiferFirst published 2005-01-0654 releasesCRAN page ↗GitHub ↗

Selects matched samples of the original treated and control groups with similar covariate distributions -- can be used to match exactly on covariates, to match on propensity scores, or perform a variety of other matching procedures. The package also implements a series of recommendations offered in Ho, Imai, King, and Stuart (2007) DOI:10.1093/pan/mpl013. (The 'gurobi' package, which is not on CRAN, is optional and comes with an installation of the Gurobi Optimizer, available at https://www.gurobi.com.)

Install

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

install.packages("MatchIt", 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("kosukeimai/MatchIt")

Development version from kosukeimai/MatchIt. 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-matchit

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

# 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-MatchIt

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-MatchIt

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

Health

CRAN checks

2NOTE11OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
NOTE r-devel-linux-x86_64-debian-gcc

Slowest check: 8.3 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

NOTE2026-07-11
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-04-22
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
10 OK · 3 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-04-10
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Show 2 earlier snapshots

ERROR2026-04-09
10 OK · 3 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 100%
References docs: 57%

Downloads

288.7K

CRAN downloads in the past year

Rank #772 · ~791/day · ~24.1K/mo

Releases R versions

Daily download trend is not available in this view yet.

20.4K30 days

70.9K90 days

288.7K1 year

Compare downloads with other packages →

Also on5.2K r2u37 autocran8.5K conda_forge204 c2d4u

Repository

GitHub ↗ kosukeimai/matchit

236Stars

51Forks

3Open issues

0Open PRs

2Releases

1,941Commits

23Contributors

1,941 commits · Last activity 2026-05-01 · 0% stars, 30d

Stars over time

2025-07-15 · 2242026-07-07 · 236

Repository practices

Upstream repositoryBeta

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

Checks run against github.com/kosukeimai/matchit on 2026-07-19.

Continuous integration (1)

GitHub Actions

Docs source (1)

README.Rmd

Lint, format, editor (2)

lintrRStudio project

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

26 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.6.0

Imports (8)

backports chk rlang RcpputilsstatsgraphicsgrDevices

LinkingTo (2)

Rcpp RcppProgress

Suggests (25)

optmatch Matching rgenoud quickmatch (>= 0.2.1)nnetrpartmgcvCBPS dbarts randomForest glmnet gbm cobaltbootmarginaleffects sandwichsurvivalRcppProgress highs Rglpk Rsymphony gurobi knitr rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Code & Tests

Code Composition

R 10,823 (48%)Rd 4,080 (18%)C++ 4,052 (18%)Vignettes 1,719 (8%)Other 1,663 (7%)C 380 (2%)

Code characteristics

Object systems

S310

Cyclomatic complexity: 4.0 median / 73 max

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

196 9 exported

Complexity

9.5 avg / 73 max

Call network

196 nodes / 472 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

Per-function coverage is not measured for this package yet.

Datasets

Bundled datasets · 1

Name	Class	Rows × Cols	Also ships in
lalonde	data.frame	614 × 1	–

People & History

People (6)

Maintainer (1)

Noah Greifer

Maintainer, Author · added in 4.0.0

Authors (5)

Noah Greifer

Maintainer, Author · added in 4.0.0

Author

Author

Author

Author

Contributors (1)

Alex Whitworth

Contributor · added in 3.0.1

Package Timeline

54 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
4.7.2Latest
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R 2.1.0 released · 2005-04-18
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R 2.0.0 released · 2004-10-04

Package metadata

First published: 2005-01-06
Total releases: 54 / 21 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.6.0
Bundled data: 29 KB / 1 file
Download size: 1.4 MB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Causal Inference Clinical Trial Design, Monitoring, Analysis and Reporting Official Statistics & Survey Statistics

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