SaturnCoefficient

1.6

Statistical Evaluation of UMAP Dimensionality Reductions

0packages depend

2.1Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Davide ChiccoFirst published 2024-12-114 releasesCRAN page ↗GitHub ↗

A metric expressing the quality of a UMAP layout. This is a package that contains the Saturn_coefficient() function that reads an input matrix, its dimensionality reduction produced by UMAP, and evaluates the quality of this dimensionality reduction by producing a real value in the [0; 1] interval. We call this real value Saturn coefficient. A higher value means better dimensionality reduction; a lower value means worse dimensionality reduction. Reference: Davide Chicco et al. (February 2026), "The advantages of our proposed Saturn coefficient over continuity and trustworthiness for UMAP dimensionality reduction evaluation", PeerJ Computer Science 12:e3424 (pp. 1-30), doi:10.7717/peerj-cs.3424.

Install

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

install.packages("SaturnCoefficient", 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("davidechicco/SaturnCoefficient_R_package")

Development version from davidechicco/SaturnCoefficient_R_package. 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-saturncoefficient

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-SaturnCoefficient

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-SaturnCoefficient

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

Health

CRAN checks

13OK

Slowest check: 3.8 min · r-oldrel-macos-x86_64

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

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
OK2026-04-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-09
13 OK · 0 NOTE · 0 WARNING · 1 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: 100%
Return-value docs: 100%
References docs: 0%

Downloads

2.1K

CRAN downloads in the past year

Rank #23,078 · ~6/day · ~171/mo

Releases R versions

Daily download trend is not available in this view yet.

14030 days

49390 days

2.1K1 year

Compare downloads with other packages →

Also on111 r2u14 autocran

Repository

GitHub ↗ davidechicco/saturncoefficient_r_package

0Stars

0Forks

1Open issues

0Open PRs

1Releases

19Commits

1Contributors

19 commits · Last activity 2026-02-12

Releases over time

2025-03-26 · 12026-07-07 · 1

Repository practices

Upstream repositoryBeta

Checks run against github.com/davidechicco/saturncoefficient_r_package on 2026-07-19.

No development-tooling practices detected in the upstream repository.

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

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.0.0

Imports (4)

MatrixCorrelation ProjectionBasedClusteringstatsumap

LinkingTo (0)

none

Suggests (3)

knitr rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 198 (50%)Rd 181 (45%)Vignettes 19 (5%)

Code characteristics

Cyclomatic complexity: 6.5 median / 8 max

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

4 4 exported

Complexity

6.5 avg / 8 max

Call network

4 nodes / 3 edges

Call graph

Open call graph →

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Lowest coverage

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

People & History

People (1)

Maintainer (1)

Davide Chicco

Author, Maintainer

Authors (1)

Davide Chicco

Author, Maintainer

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
1.6Latest
2026-02-10 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
1.4
2025-02-14 · diff ↗
1.3
2024-12-17 · diff ↗
1.2
2024-12-11
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-12-11
Total releases: 4 / 2 yrs
License: GPL-3 OSI
Minimum R: ≥ 4.0.0
Download size: 7.0 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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