segmented

2.2-1

Regression Models with Break-Points / Change-Points Estimation (with Possibly Random Effects)

27packages depend

502Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Vito M. R. MuggeoFirst published 2003-10-0767 releasesCRAN page ↗

Fitting regression models where, in addition to possible linear terms, one or more covariates have segmented (i.e., broken-line or piece-wise linear) or stepmented (i.e. piece-wise constant) effects. Multiple breakpoints for the same variable are allowed. The estimation method is discussed in Muggeo (2003, doi:10.1002/sim.1545) and illustrated in Muggeo (2008, https://www.r-project.org/doc/Rnews/Rnews_2008-1.pdf). An approach for hypothesis testing is presented in Muggeo (2016, doi:10.1080/00949655.2016.1149855), and interval estimation for the breakpoint is discussed in Muggeo (2017, doi:10.1111/anzs.12200). Segmented mixed models, i.e. random effects in the change point, are discussed in Muggeo (2014, doi:10.1177/1471082X13504721). Estimation of piecewise-constant relationships and changepoints (mean-shift models) is discussed in Fasola et al. (2018, doi:10.1007/s00180-017-0740-4).

Install

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

install.packages("segmented", 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-segmented

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-segmented

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-segmented

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

Health

CRAN checks

13OK

Slowest check: 4.6 min · r-devel-linux-x86_64-fedora-clang

Code health

None

Tests · ratio 0.00

not tracked

Coverage

99%

Documentation · exports

Dependencies · direct

Check history

OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSYes · 67% structuredCode of conductNoContributing guideNo

Examples that run: 85%
Documented parameters: 63%
Return-value docs: 92%
References docs: 91%

Downloads

502K

CRAN downloads in the past year

Rank #559 · ~1.4K/day · ~41.8K/mo

Releases R versions

Daily download trend is not available in this view yet.

52.1K30 days

129.9K90 days

502K1 year

Compare downloads with other packages →

Also on2.8K r2u335 autocran30.1K conda_forge159 bioconda183 c2d4u

Dependencies

Declared dependencies

0 external dependencies (excludes base and recommended)

Depends (3)

R >= 3.5.0MASSnlme

Imports (0)

none

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

27direct

136indirect

Code & Tests

Code Composition

R 21,718 (84%)Rd 4,063 (16%)

Code characteristics

Object systems

S337

Cyclomatic complexity: 31.0 median / 148 max

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

77 69 exported

Complexity

43 avg / 148 max

Call network

77 nodes / 100 edges

Call graph

Open call graph →

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Lowest coverage

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

Datasets

Bundled datasets · 4

Name	Class	Rows × Cols	Also ships in
down	data.frame	30 × 3	–
globTempAnom	data.frame	174 × 2	–
plant	data.frame	103 × 3	–
stagnant	data.frame	28 × 2	–

People & History

People (1)

Maintainer (1)

Vito M. R. Muggeo

Author, Maintainer

Authors (1)

Vito M. R. Muggeo

Author, Maintainer

Listed in earlier versions (2)

Vito M.R. Muggeo

no longer listed · 0.2-0 to 0.2-9.1

Muggeo

no longer listed · 0.2-9.2 to 2.2-1

Package Timeline

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Package metadata

First published: 2003-10-07
Total releases: 67 / 23 yrs
License: GPL
Minimum R: ≥ 3.5.0
Bundled data: 2.3 KB / 4 files
Download size: 315 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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