CRAN requires the check problems on this package to be fixed before 2026-08-02 or it will be archived.

expm

1.0-0

Matrix Exponential, Log, 'etc'

115packages depend

947.9Kdownloads / year

87.2%test coverage

8/13checks pass

Overview

About

Maintained by Martin MaechlerFirst published 2010-07-0819 releasesCRAN page ↗

Computation of the matrix exponential, logarithm, sqrt, and related quantities, using traditional and modern methods.

Install

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

install.packages("expm", 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-expm

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-expm

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-expm

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

Health

CRAN checks

1ERROR4NOTE8OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
ERROR r-devel-linux-x86_64-debian-gcc
NOTE r-devel-linux-x86_64-fedora-clang
NOTE r-devel-linux-x86_64-fedora-gcc
NOTE r-devel-windows-x86_64

Slowest check: 2.9 min · r-oldrel-macos-x86_64

Code health

Yes

Tests · ratio 0.81

87.2%

Coverage · measured lines

92%

Documentation · exports

Dependencies · direct

Check history

ERROR2026-07-23
8 OK · 4 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-07-12
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 84%
Return-value docs: 100%
References docs: 80%

Downloads

947.9K

CRAN downloads in the past year

Rank #405 · ~2.6K/day · ~79K/mo

Releases R versions

Daily download trend is not available in this view yet.

65.8K30 days

228.7K90 days

947.9K1 year

Compare downloads with other packages →

Also on14.9K r2u140 autocran77.5K conda_forge286 c2d4u

Repository

Repository ↗ projects/expm

Repository practices

Upstream repositoryBeta

Repository r-forge.r-project.org/projects/expm is linked, but repository-practices checks have not run for it yet. Checks are GitHub-only for now.

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

Dependencies

Declared dependencies

3 external dependencies (excludes base and recommended)

Depends (1)

Matrix

Imports (1)

methods

LinkingTo (0)

none

Suggests (3)

RColorBrewer sfsmisc Rmpfr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

115direct

308indirect

and 67 more packages.

Code & Tests

People & History

People (7)

Maintainer (1)

Martin Maechler

Author, Maintainer

Authors (3)

Martin Maechler

Author, Maintainer

Christophe Dutang

Author

Vincent Goulet

Author

Contributors (4)

Douglas Bates

Contributor · added in 0.999-7

David Firth

Contributor

Marina Shapira

Contributor

Michael Stadelmann

Contributor

Listed in earlier versions (1)

expm-developers@lists.R-forge.R-project.org

no longer listed · 0.98-1 to 0.999-0

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
1.0-0Latest
2024-08-19 · current release · diff ↗
R
R 4.4.0 released · 2024-04-24
0.999-9
2024-01-11 · diff ↗
0.999-8
2023-11-29 · diff ↗
R
R 4.3.0 released · 2023-04-21
0.999-7
2023-01-09 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
0.999-6
2021-01-13 · diff ↗
0.999-5
2020-07-20 · diff ↗
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
0.999-4
2019-03-21 · diff ↗
0.999-3
2018-09-22 · diff ↗

Show 22 earlier events

R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
0.999-2
2017-03-29 · diff ↗
0.999-1
2017-02-02 · diff ↗
R
R 3.3.0 released · 2016-05-03
0.999-0
2015-10-07 · diff ↗
R
R 3.2.0 released · 2015-04-16
R
R 3.1.0 released · 2014-04-10
0.99-1.1
2014-02-12 · diff ↗
0.99-1
2013-12-10 · diff ↗
R
R 3.0.0 released · 2013-04-03
0.99-0
2012-09-04 · diff ↗
R
R 2.15.0 released · 2012-03-30
R
R 2.14.0 released · 2011-10-31
0.98-5
2011-08-20 · diff ↗
R
R 2.13.0 released · 2011-04-13
0.98-4
2011-03-31 · diff ↗
R
R 2.12.0 released · 2010-10-15
0.98-3
2010-08-14 · diff ↗
0.98-2
2010-07-27 · diff ↗
0.98-1
2010-07-08
R
R 2.11.0 released · 2010-04-22

Package metadata

First published: 2010-07-08
Total releases: 19 / 16 yrs
License: GPL (>= 2) OSI
Bundled data: 0.5 KB / 1 file
Download size: 138 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Numerical Mathematics

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