R Observatory: Metrics for schemr version 0.3.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

schemr

0.3.1Package record

Convert Images to Usable Color Schemes

1packages depend

3.5Kdownloads / year

0.0%test coverage

8/13flavors OK

Overview

About

Maintained by Stuart MorrisonCRAN page ↗GitHub ↗Issues ↗

A fast and adaptable tool to convert photos and images into usable colour schemes for data visualisation. Contains functionality to extract colour palettes from images, as well for the conversion of images between colour spaces.

Changes in 0.3.1

Bug fixes

Updated depends to explicitly require the base pipe operator.

From NEWS.md in the release

Install

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

install.packages("schemr", 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("stuart-morrison/schemr")

Development version from stuart-morrison/schemr. 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-schemr

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-schemr

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-schemr

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

5NOTE8OK

Check messages

NOTER code for possible problemsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-devel-windows-x86_64

Found calls to structure() using deprecated special names:
  schemr/R/colour-space-constants.R (.Dim: 4, .Dimnames: 4)
'.Dim' should be changed to 'dim'.
'.Dimnames' should be changed to 'dimnames'.

CRAN check page ↗

Slowest check: 2.4 min · r-oldrel-windows-x86_64

Status changes

NOTE8 OK, 5 NOTENow
NOTE11 OK, 2 NOTE2026-07-16
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.3.1

READMEYes · 354 wordsVignettesNoNEWSYes · 33% structured · mentions 0.3.1Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 30
Examples that run: 100%16 run in a plain check
Exported functions with examples: 59%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 0%

How these are measured

Downloads

3.5K

CRAN downloads in the past year

Rank #14,830 · ~10/day · ~292/mo

Releases R versions

Daily download trend is not available in this view yet.

25230 days

81790 days

3.5K1 year

Compare downloads with other packages →

Also on72 r2u3 autocran

How downloads are counted

Repository

stuart-morrison/schemr ↗Account: stuart-morrison

2Stars

0Forks

0Open issues

0Open PRs

4Releases

62Commits

3Commit identities

62 commits · Last activity 2025-01-22 · Default branch at 0.3.1.9000, ahead of CRAN 0.3.1 (checked 2026-10-22)

Responsiveness

How these are sampled

PRs merged (all time): not measured
Median days to close, 50 most recently updated closed issues: 28
Median days to close, 50 most recently updated closed PRs: not measured

Stars over time

2020-04-02 · 12026-07-07 · 2

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/stuart-morrison/schemr 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

CRAN release process (1)

cran-comments.md

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

7 external dependencies (excludes base and recommended)

Installing schemr adds 47 packages (32 with compiled code, 46 MB of source tarballs). Heaviest: stringi 11 MB, bslib 5.6 MB, OpenImageR 3.6 MB.

Depends (1)

R >= 4.1.0

Imports (7)

dplyr stringr magrittr purrr apcluster OpenImageRmethods

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

Imports 1

Depends, Imports or LinkingTo, most downloaded first

googletraffic

How these are counted

Code & Tests

People & History

People (1)

Stuart Morrison

Author, Maintainer since 0.1.0 (2021)

Releases (4)

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
0.3.1Latest
record
2025-01-22 · current release · diff ↗
0.3.0
record
2024-06-25 · diff ↗ ·
added 14 exports
hsl_to_hsv, hsl_to_lab, hsl_to_rgb, hsl_to_xyz, hsv_to_hsl, hsv_to_lab, hsv_to_rgb, hsv_to_xyz, lab_to_hsl, lab_to_hsv, rgb_to_hsl, rgb_to_hsv, xyz_to_hsl, xyz_to_hsv
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
0.2.0
record
2023-02-02 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
0.1.0
record
2021-03-10
R
R 4.0.0 released · 2020-04-24

Package metadata

First published: 2021-03-10
Total releases: 4 / 5 yrs
License: GPL-3 OSI
Minimum R: ≥ 4.1.0
Download size: 16 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("schemr")

Format

Morrison, S. (2025). schemr: Convert Images to Usable Color Schemes (Version 0.3.1) [Computer software]. https://doi.org/10.32614/CRAN.package.schemr

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

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 schemr version 0.3.1 [Data set]. HJJB, LLC. Data release v2026-10-24. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-24, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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