R Observatory: Metrics for palr version 0.5.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

palr

0.5.0Package record

Colour Palettes for Data

1packages dependsuggested by 2

34.9Kdownloads / year

83.6%test coverage

13/13flavors OK

Overview

About

Maintained by Michael D. SumnerCRAN page ↗GitHub ↗Website ↗Issues ↗

Colour palettes for data, based on some well known public data sets. Includes helper functions to map absolute values to known palettes, and capture the work of image colour mapping as raster data sets.

Changes in 0.5.0

Fixed a long-standing bug in sst_pal(), chl_pal(), ice_pal(), and bathy_deep_pal(): data values below the first palette break were silently dropped from the output (a zero index from findInterval()), shortening the result and misaligning colours. Out of range values now clamp to the end colours and output length always matches input length.
The absolute palettes now share one internal worker abs_pal(), unifying alpha handling and the n-colours/data/palette/function modes. The function mode (pal()) now respects alpha.
New function image_hex() converts matrices and arrays (1-band palette, grey+alpha, RGB, RGBA, raw, logical, character) to a matrix of hex colours. This is the colour engine shared with the {ximage} package, with robust handling of missing, non-finite, and constant data.

Show all changes in 0.5.0Hide the rest of the changes in 0.5.0

New stretch functions stretch_linear(), stretch_log(), stretch_sqrt(), and stretch_histeq() rescale data to [0, 1] ahead of colour mapping, based on experience with Sentinel-2. They preserve matrix/array dimensions, map constant input to 0.5, return NA for non-finite input, and accept absolute bounds via lim for scene-independent stretches.
New function dirty_pal() for global bathymetry/topography (AAD underway, DiRT). Follows the standard palr palette modes.
d_pal() and image_pal() now map constant data to a mid-palette colour instead of returning NA.
Tests moved to testthat edition 3, fixed a test that used the magrittr pipe without it being available.
Removed unused Suggests of viridis, removed large blocks of commented-out legacy code.
Fixed deprecated usage of structure() thanks to CRAN.

From NEWS.md in the release

Install

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

install.packages("palr", 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("AustralianAntarcticDivision/palr")

Development version from AustralianAntarcticDivision/palr. 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-palr

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-palr

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-palr

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: 1.5 min · r-oldrel-macos-x86_64

Status changes

OK13 OK2026-08-12
NOTE11 OK, 2 NOTE2026-07-16
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.5.0

READMEYes · 221 wordsVignettesYes · 2 · dynamicNEWSYes · 100% structured · mentions 0.5.0Citation fileNoWebsiteYes · pkgdown

Help pages: 13includes a package overview page
Examples that run: 92%11 run in a plain check · 1 only when donttest examples are enabled (R CMD check --as-cran)
Exported functions with examples: 100%
Documented parameters: 97%
Return-value docs: 100%
Help pages citing references: 38%

Vignettes (2)

How these are measured

Downloads

34.9K

CRAN downloads in the past year

Rank #2,493 · ~96/day · ~2.9K/mo

Releases R versions

Daily download trend is not available in this view yet.

2.2K30 days

6.5K90 days

34.9K1 year

Compare downloads with other packages →

Also on115 r2u1 autocran4.3K conda_forge

How downloads are counted

Repository

australianantarcticdivision/palr ↗Organization: AustralianAntarcticDivision

3Stars

0Forks

5Open issues

0Open PRs

1Releases

126Commits

3Commit identities

126 commits · Last activity 2026-08-05

Responsiveness

How these are sampled

PRs merged (all time): 100%
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

2021-11-07 · 32026-07-07 · 3

How these are measured

PracticesBeta

10 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/australianantarcticdivision/palr on 2026-10-21.

Continuous integration (2)

GitHub ActionsR CMD check workflow

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

Governance and community (1)

Code of conduct

Docs source (4)

README.Rmdpkgdown

GitHub Pages site last deployed 2026-08-05 · The repository has a site deploy workflow

pkgdown site last built 2026-08-05

Reproducibility and dev environment (1)

data-raw/

Show all practicesHide 1 practice

CRAN release process (2)

cran-comments.mdrevdep/

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

Dependencies

Declared dependencies

6 external dependencies (excludes base and recommended)

Installing palr adds no packages beyond those that come with R.

Depends (1)

R >= 3.6.0

Imports (1)

grDevices

LinkingTo (0)

none

Suggests (6)

knitr rmarkdown raster testthat covr stars

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

1indirect

Imports 1

Suggested by 2

Depends, Imports or LinkingTo, most downloaded first

quadmesh

Suggests, most downloaded first

paletteer inDAGO

How these are counted

Code & Tests

Datasets

People & History

People (4)

Michael D. Sumner

R Core Team and contributors worldwide

Contributor · added in 0.1.0

source code of image.default

Abigael Proctor

Contributor · added in 0.1.0

Named the package

Tomas Remenyi

Contributor · added in 0.1.0

Provided colours for element_pal

Releases (7)

Pick two releases to compare their code metrics.

0.5.0Latest
record
2026-08-05 · current release · diff ↗ ·
added 6 exports
dirty_pal, image_hex, stretch_histeq, stretch_linear, stretch_log, stretch_sqrt
R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
0.4.0
record
2023-11-06 · diff ↗
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
0.3.0
record
2021-05-05 · diff ↗ ·
added 2 exports
d_pal, data_pal
R
R 4.0.0 released · 2020-04-24
0.2.0
record
2020-01-30 · diff ↗
0.1.0
record
2019-11-07 · diff ↗ ·
added 7 exports
bathy_deep_pal, chl_pal, ice_pal, image_pal, image_raster, image_stars, sst_pal
R
R 3.6.0 released · 2019-04-26
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
0.0.6
record
2016-07-27 · diff ↗ ·
added 2 exports
bathyDeepPal, mk_timePal

Show 3 earlier eventsHide 3 earlier events

R
R 3.3.0 released · 2016-05-03
0.0-4
record
2015-06-11
R
R 3.2.0 released · 2015-04-16

Package metadata

First published: 2015-06-11
Total releases: 7 / 11 yrs
License: GPL-3 OSI
Minimum R: ≥ 3.6.0
Bundled data: 46 KB / 2 files
Download size: 236 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("palr")

Format

Sumner, M. D., R Core Team and contributors worldwide, Proctor, A., & Remenyi, T. (2026). palr: Colour Palettes for Data (Version 0.5.0) [Computer software]. https://doi.org/10.32614/CRAN.package.palr

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 palr version 0.5.0 [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.

Report a problem with this page →