R Observatory: Metrics for douconca version 1.2.6

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

douconca

1.2.6Package record

Double Constrained Correspondence Analysis for Trait-Environment Analysis in Ecology

0packages depend

3.2Kdownloads / year

81.2%test coverage

13/13flavors OK

Overview

About

Maintained by Bart-Jan van RossumCRAN page ↗GitHub ↗Issues ↗

Double constrained correspondence analysis (dc-CA) analyzes (multi-)trait (multi-)environment ecological data by using the 'vegan' package and native R code. Throughout the two step algorithm of ter Braak et al. (2018) is used. This algorithm combines and extends community- (sample-) and species-level analyses, i.e. the usual community weighted means (CWM)-based regression analysis and the species-level analysis of species-niche centroids (SNC)-based regression analysis. The two steps use canonical correspondence analysis to regress the abundance data on to the traits and (weighted) redundancy analysis to regress the CWM of the orthonormalized traits on to the environmental predictors. The function dc_CA() has an option to divide the abundance data of a site by the site total, giving equal site weights. This division has the advantage that the multivariate analysis corresponds with an unweighted (multi-trait) community-level analysis, instead of being weighted. The first step of the algorithm uses vegan::cca(). The second step uses wrda() but vegan::rda() if the site weights are equal. This version has a predict() function. For details see ter Braak et al. 2018 doi:10.1007/s10651-017-0395-x. and ter Braak & van Rossum 2025 doi:10.1016/j.ecoinf.2025.103143.

Changes in 1.2.6

No user visible changes.

From NEWS.md in the release

Install

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

install.packages("douconca", 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("Biometris/douconca")

Development version from Biometris/douconca. 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-douconca

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-douconca

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-douconca

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: 5.6 min · r-release-macos-x86_64

Status changes

OK13 OK2026-08-28
ERROR10 OK, 3 ERROR2026-07-27
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.2.6

READMEYes · 345 wordsVignettesYes · 1 · dynamicNEWSYes · 100% structured · mentions 1.2.6Citation fileNo

Help pages: 29 (2 internal)includes a package overview page
Examples that run: 100%25 run in a plain check
Exported functions with examples: 85%
Documented parameters: 99%
Return-value docs: 92%
Help pages citing references: 45%

Also includes 15 demo scripts (run with demo())

Vignettes (1)

douconca

How these are measured

Downloads

3.2K

CRAN downloads in the past year

Rank #7,841 · ~9/day · ~269/mo

Releases R versions

Daily download trend is not available in this view yet.

50830 days

1.2K90 days

3.2K1 year

Compare downloads with other packages →

Also on887 r2u4 autocran

How downloads are counted

Repository

biometris/douconca ↗Organization: Biometris

1Stars

1Forks

0Open issues

0Open PRs

2Releases

196Commits

2Commit identities

correspondence-analysisecologyecology-modelingmulti-environmentmulti-traitr-package

196 commits · Last activity 2026-09-09 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 0%
Median days to close, 50 most recently updated closed issues: 8
Median days to close, 50 most recently updated closed PRs: 4

Stars over time

2026-07-14 · 02026-08-13 · 1

How these are measured

PracticesBeta

10 development-tooling and community-health practices detected across 6 families in the upstream repository

Checks run against github.com/biometris/douconca on 2026-10-18.

Continuous integration (2)

GitHub ActionsR CMD check workflow

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

Docs source (4)

README.Rmdpkgdown

GitHub Pages site last deployed 2026-09-09 · The repository has a site deploy workflow

Coverage (1)

Coverage reporting

CRAN release process (1)

cran-comments.md

Show all practicesHide 2 practices

Research and citation (1)

Zenodo

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

9 external dependencies (excludes base and recommended)

Installing douconca adds 22 packages (10 with compiled code, 18 MB of source tarballs). Heaviest: ggplot2 6.0 MB, Rcpp 1.8 MB, isoband 1.5 MB.

Depends (1)

R >= 4.0.0

Imports (7)

ggplot2 ggrepel gridExtra permute rlangstatsvegan

LinkingTo (0)

none

Suggests (3)

rmarkdown knitr tinytest

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 (2)

Bart-Jan van Rossum

Author, Maintainer since 1.2.0 (2024)

Cajo J.F ter Braak

Author

Releases (8)

Pick two releases to compare their code metrics.

1.2.6Latest
record
2026-09-09 · current release · diff ↗
1.2.5.1
record
2026-08-24 · diff ↗
R
R 4.6.0 released · 2026-04-24
1.2.5
record
2026-02-23 · diff ↗
1.2.4
record
2025-10-14 · diff ↗
1.2.3
record
2025-05-09 · diff ↗ ·
added 4 exports
FS, cca0, fN2, ipf2N2
R
R 4.5.0 released · 2025-04-11
1.2.2
record
2024-12-02 · diff ↗
1.2.1
record
2024-09-25 · diff ↗
1.2.0
record
2024-09-13
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-09-13
Total releases: 8 / 2 yrs
License: GPL-3 OSI
Minimum R: ≥ 4.0.0
Bundled data: 2.6 KB / 1 file
Download size: 834 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("douconca")

Format

van Rossum, B., & ter Braak, C. J. F. (2026). douconca: Double Constrained Correspondence Analysis for Trait-Environment Analysis in Ecology (Version 1.2.6) [Computer software]. https://doi.org/10.32614/CRAN.package.douconca

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 douconca version 1.2.6 [Data set]. HJJB, LLC. Data release v2026-10-22. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-22, 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 →