SQUAREM

2026.1

Squared Extrapolation Methods for Accelerating EM-Like Monotone Algorithms

13packages depend

1.7Mdownloads / year

78.1%test coverage

13/13checks pass

Overview

About

Maintained by Ravi VaradhanFirst published 2010-08-0816 releasesCRAN page ↗

Algorithms for accelerating the convergence of slow, monotone sequences from smooth, contraction mappings such as the EM algorithm. It can be used to accelerate any smooth, linearly convergent scheme. A tutorial-style introduction is available in vignette("SQUAREM"). See also: Varadhan & Roland (2008) doi:10.18637/jss.v092.i07.

Install

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

install.packages("SQUAREM", 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-squarem

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-SQUAREM

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-SQUAREM

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

Health

CRAN checks

13OK

Slowest check: 1.9 min · r-oldrel-macos-x86_64

Code health

Yes

Tests · ratio 0.19

78.1%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-03-19
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-03-10
0 OK · 14 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 100%
References docs: 67%

Downloads

1.7M

CRAN downloads in the past year

Rank #302 · ~4.6K/day · ~139.4K/mo

Releases R versions

Daily download trend is not available in this view yet.

111.8K30 days

410.6K90 days

1.7M1 year

Compare downloads with other packages →

Also on28.9K r2u40 autocran304K conda_forge4.5K c2d4u

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.0

Imports (0)

none

LinkingTo (0)

none

Suggests (2)

setRNG interval

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

13direct

442indirect

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Code & Tests

Code Composition

R 741 (49%)Rd 503 (33%)Vignettes 203 (14%)Other 55 (4%)

Code characteristics

Cyclomatic complexity: 22.0 median / 30 max

Test coverage

Line coverage

78%

Expression

77.4%

Tests / Examples

78.1% / 77% ex

Functions

6 2 exported

Complexity

20.2 avg / 30 max

Call network

6 nodes / 4 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

6 functions

Function	Cyclo	Coverage
fpiter exp	12	73%
cyclem2	26	76%
squarem1	25	76%
cyclem1	30	79%
squarem2	19	82%
squarem exp	9	86%

People & History

People (1)

Maintainer (1)

Ravi Varadhan

Author, Maintainer

Authors (1)

Ravi Varadhan

Author, Maintainer

Package Timeline

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

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R 4.6.0 released · 2026-04-24
2026.1Latest
2026-03-12 · current release · diff ↗
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R 4.5.0 released · 2025-04-11
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R 4.4.0 released · 2024-04-24
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R 4.3.0 released · 2023-04-21
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R 4.2.0 released · 2022-04-22
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R 4.1.0 released · 2021-05-18
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R 4.0.0 released · 2020-04-24
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R 3.6.0 released · 2019-04-26
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R 3.5.0 released · 2018-04-23

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2017.10-1
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R 3.4.0 released · 2017-04-21
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R 3.3.0 released · 2016-05-03
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R 3.2.0 released · 2015-04-16
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R 3.1.0 released · 2014-04-10
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R 3.0.0 released · 2013-04-03
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R 2.15.0 released · 2012-03-30
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R 2.14.0 released · 2011-10-31
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R 2.13.0 released · 2011-04-13
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R 2.12.0 released · 2010-10-15
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2010.8-2
2010-08-09 · diff ↗
2010.8-1
2010-08-08
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R 2.11.0 released · 2010-04-22

Package metadata

First published: 2010-08-08
Total releases: 16 / 16 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 4.0
Download size: 236 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Numerical Mathematics

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