R Observatory: Metrics for changepoint version 2.3

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

changepoint

2.3Package record

Methods for Changepoint Detection

29packages dependsuggested by 5

117.3Kdownloads / year

55.6%test coverage

13/13flavors OK

Overview

About

Maintained by Rebecca KillickCRAN page ↗GitHub ↗Issues ↗

Implements various mainstream and specialised changepoint methods for finding single and multiple changepoints within data. Many popular non-parametric and frequentist methods are included. The cpt.mean(), cpt.var(), cpt.meanvar() functions should be your first point of call.

Changes in 2.3

Added cpt.reg() function for changes in regression. Thanks to Harjit Hullait who coded the C backend for this whilst at the STOR-i doctoral training centre at Lancaster University. Thanks also to Simon Taylor who updated the documentation for cpt.reg() from an earlier version.
Added some generics for cpt.range that were missing before; nseg, seg.len. Previously these inherited from cpt, but now these can be called on the @cpts slot (default) or optionally with a ncpts argument for the specified number of changepoints.
Moved the fit functions outside of the param functions. Previously these were unnecessarily repeated across cpt, cpt.reg and cpt.range classes. This necessitated the adding of the generics that we missing for cpt.range so it worked seamlessly across classes.
Repeated code to calculate the cpts from a ncpts argument in cpt.range methods was removed.
The diagnostic plot for cpt.range objects (plot(object,diagnostic=TRUE)) has been changed to be more informative. The axes have been swapped and instead of a line graph, a stepped graph is used which better reflects that you can't get fractional numbers of changepoints (type="s"). This can be overridden with another type if preferred. Reworded the man file for plot-methods to reflect this change.
Added the upper bound on the tested penalty values to the pen.value.full slot for CROPS output. Previously this was automatically removed and so you needed the original function call to know the upper bound that was tested.
Added fitted and residuals methods for cpt, cpt.reg, cpt.range classes.

From NEWS in the release

Install

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

install.packages("changepoint", 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("rkillick/changepoint")

Development version from rkillick/changepoint. 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-changepoint

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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-changepoint

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-changepoint

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 7.6 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 2.3

READMENoVignettesNoNEWSYes · 100% structured · mentions 2.3Citation fileYes · cites a publicationWebsitenot declared in DESCRIPTION

Help pages: 91 (73 internal)includes a package overview page
Examples that run: 94%44 run in a plain check · 3 hold no code
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 10%

How these are measured

Downloads

117.3K

CRAN downloads in the past year

Rank #1,331 · ~321/day · ~9.8K/mo

Releases R versions

Daily download trend is not available in this view yet.

7.4K30 days

21.8K90 days

117.3K1 year

Compare downloads with other packages →

Also on940 r2u15 autocran5.9K conda_forge234 bioconda126 c2d4u

How downloads are counted

Repository

rkillick/changepoint ↗Account: rkillick

140Stars

38Forks

14Open issues

0Open PRs

4Releases

92Commits

8Commit identities

rpackagecranchangepointsegmentation

92 commits · Last activity 2024-12-03 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 71%
Median days to close, 50 most recently updated closed issues: 2
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-08-20 · 1372026-09-03 · 140

How these are measured

PracticesBeta

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

Checks run against github.com/rkillick/changepoint on 2026-10-22.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Research and citation (1)

CITATION.cff

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

3 external dependencies (excludes base and recommended)

Installing changepoint adds 1 package (1 with compiled code, 675 KB of source tarballs). Heaviest: zoo 675 KB.

Depends (4)

R >= 3.2methodsstatszoo

Imports (0)

none

LinkingTo (0)

none

Suggests (2)

testthat vdiffr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

29direct

7indirect

Depends 5 · Imports 24

Suggested by 5

Show all 34 packagesHide all 34 packages

Depends, Imports or LinkingTo, most downloaded first

Suggests, most downloaded first

ggfortify atime binsegRcpp lterdatasampler jointseg

How these are counted

Code & Tests

Datasets

People & History

People (7)

Rebecca Killick

Author, Maintainer since 0.3 (2011)

Paul Fearnhead

Contributor, Thesis advisor · added in 1.0

Kaylea Haynes

Contributor · added in 1.1.2

Harjit Hullait

Contributor · added in 2.3

Robin Long

Contributor · added in 2.2.4

Idris Eckley

Thesis advisor · added in 1.0

Jamie Lee

Contractor · added in 2.0.1

Listed in earlier versions (1)

Idris A. Eckley

no longer listed · 2.12.2 to 0.8

Releases (37)

Pick two releases to compare their code metrics.

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R 4.6.0 released · 2026-04-24
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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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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
3.0.3Latest
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2014-01-16 · current release · diff ↗
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2013-06-19 · diff ↗
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R 3.0.0 released · 2013-04-03

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2.15.1
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2012-05-13 · diff ↗ ·
added 6 exports
PELT.meanvar.poisson, binseg.meanvar.poisson, multiple.meanvar.poisson, segneigh.meanvar.poisson, single.meanvar.poisson, single.meanvar.poisson.calc
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R 2.15.0 released · 2012-03-30
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2.3
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cpt.reg
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BINSEG, decision, penalty_decision, PELT, class_input
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2015-07-27 · diff ↗ ·
removed 49 exports
PELT.mean.norm, PELT.meanvar.exp, PELT.meanvar.poisson, PELT.meanvar.gamma, PELT.meanvar.norm, PELT.var.norm, binseg.mean.cusum, binseg.mean.norm, binseg.meanvar.exp, binseg.meanvar.poisson, binseg.meanvar.gamma, binseg.meanvar.norm, binseg.var.css, binseg.var.norm, decision, method<-, multiple.mean.cusum, multiple.mean.norm, multiple.meanvar.exp, multiple.meanvar.poisson, multiple.meanvar.gamma, multiple.meanvar.norm, multiple.var.css, multiple.var.norm, param, segneigh.mean.cusum, segneigh.mean.norm, segneigh.meanvar.exp, segneigh.meanvar.poisson, segneigh.meanvar.gamma and 19 more
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2011-07-30 · diff ↗ ·
added 46 exports
PELT.mean.norm, PELT.meanvar.exp, PELT.meanvar.gamma, PELT.meanvar.norm, PELT.var.norm, binseg.mean.cusum, binseg.mean.norm, binseg.meanvar.exp, binseg.meanvar.gamma, binseg.meanvar.norm, binseg.var.css, binseg.var.norm, cpt.mean, cpt.meanvar, cpt.var, decision, method<-, multiple.mean.cusum, multiple.mean.norm, multiple.meanvar.exp, multiple.meanvar.gamma, multiple.meanvar.norm, multiple.var.css, multiple.var.norm, param, segneigh.mean.cusum, segneigh.mean.norm, segneigh.meanvar.exp, segneigh.meanvar.gamma, segneigh.meanvar.norm and 16 more
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2011-01-25
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R 2.12.0 released · 2010-10-15

Package metadata

First published: 2011-01-21
Total releases: 37 / 15 yrs
License: GPL
Minimum R: ≥ 3.2
Bundled data: 187 KB / 5 files
Download size: 274 KB

Appears in task views

Time Series Analysis

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("changepoint")

The package provides a citation file that builds its entry when R runs it. Run citation() to see it.

The repository also keeps a CITATION.cff.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for changepoint version 2.3 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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