R Observatory: Metrics for cops version 1.12-1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

cops

1.12-1Package record

Cluster Optimized Proximity Scaling

0packages depend

4Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Thomas RuschCRAN page ↗Repository ↗

Multidimensional scaling (MDS) methods that aim at pronouncing the clustered appearance of the configuration (Rusch, Mair & Hornik, 2021, doi:10.1080/10618600.2020.1869027). They achieve this by transforming proximities/distances with explicit power functions and penalizing the fitting criterion with a clusteredness index, the OPTICS Cordillera (Rusch, Hornik & Mair, 2018, doi:10.1080/10618600.2017.1349664). There are two variants: One for finding the configuration directly (COPS-C) with given explicit power transformations and implicit ratio, interval and non-metric optimal scaling transformations (Borg & Groenen, 2005, ISBN:978-0-387-28981-6), and one for using the augmented fitting criterion to find optimal hyperparameters for the explicit transformations (P-COPS). The package contains various functions, wrappers, methods and classes for fitting, plotting and displaying a large number of different MDS models (most of the functionality in smacofx) in the COPS framework. The package further contains a function for pattern search optimization, the ``Adaptive Luus-Jaakola Algorithm'' (Rusch, Mair & Hornik, 2021,doi:10.1080/10618600.2020.1869027) and a functions to calculate the phi-distances for count data or histograms.

Changes in 1.12-1

Fixed bug in optimal scaling of disparities.

From NEWS in the release

Install

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

install.packages("cops", 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-cops

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-cops

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-cops

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: 4.5 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-09-04
NOTE12 OK, 1 NOTE2026-08-31
OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-06-09

Show 6 earlier changesHide 6 earlier changes

ERROR12 OK, 1 ERROR2026-06-08
OK13 OK2026-05-02
ERROR11 OK, 1 ERROR2026-04-25
OK14 OK2026-04-10
ERROR13 OK, 1 ERROR2026-04-09
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.12-1

READMENoVignettesYes · 2 · dynamicNEWSYes · 100% structured · mentions 1.12-1Citation fileYes · cites a publicationWebsitenot declared in DESCRIPTION

Help pages: 39 (1 internal)includes a package overview page
Examples that run: 90%9 run in a plain check · 1 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 80%
Documented parameters: 87%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (2)

How these are measured

Downloads

4K

CRAN downloads in the past year

Rank #8,662 · ~11/day · ~332/mo

Releases R versions

Daily download trend is not available in this view yet.

44830 days

1.1K90 days

4K1 year

Compare downloads with other packages →

Also on101 r2u10 autocran85 c2d4u

How downloads are counted

Repository

r-forge.r-project.org/projects/stops ↗

Responsiveness

not measured

How these are measured

PracticesBeta

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

How this is detected·Detection ruleset v3 (2026-09-26)

Dependencies

Declared dependencies

17 external dependencies (excludes base and recommended)

Installing cops adds 161 packages (88 with compiled code, 114 MB of source tarballs). Heaviest: stringi 11 MB, ggplot2 6.0 MB, data.table 5.7 MB.

Depends (3)

R >= 3.5.0cordillera smacofx

Imports (13)

smacof analogue cmaes crs dfoptim GenSA minqa NlcOptim nloptr pso rgenoud Rsolnp subplex

LinkingTo (0)

none

Suggests (2)

R.rsp rmarkdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (3)

Thomas Rusch

Author, Maintainer since 1.0-2 (2019)

Patrick Mair

Author

Kurt Hornik

Contributor · added in 1.11-3

Listed in earlier versions (1)

Jan de Leeuw

no longer listed · 1.0-2 to 1.3-1

Releases (5)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
1.12-1Latest
record
2024-09-22 · current release · diff ↗
1.11-3
record
2024-06-27 · diff ↗ ·
removed 7 exports
cmdscale, conf_adjust, plot3dstatic, powerStressFast, powerStressMin, sammon, torgerson

added 3 exports
copStressMin, copsc, phidistance
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
1.3-1
record
2023-01-19 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
1.2-0
record
2021-03-23 · diff ↗
R
R 4.0.0 released · 2020-04-24
1.0-2
record
2019-11-01
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2019-11-01
Total releases: 5 / 7 yrs
License: GPL-2 | GPL-3 OSI
Minimum R: ≥ 3.5.0
Bundled data: 13 KB / 2 files
Download size: 464 KB

Appears in task views

Psychometric Models and Methods

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("cops")

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

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 cops version 1.12-1 [Data set]. HJJB, LLC. Data release v2026-10-20. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-20, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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