barrel: Covariance-Based Ellipses and Annotation Tools for Ordination
Plots
Provides tools to visualize ordination results in 'R' by adding covariance-based ellipses, centroids, vectors, and confidence regions to plots created with 'ggplot2'.
The package extends the 'vegan' framework and supports Principal Component Analysis (PCA), Redundancy Analysis (RDA), and Non-metric Multidimensional Scaling (NMDS).
Ellipses can represent either group dispersion (standard deviation, SD) or centroid precision (standard error, SE), following Wang et al. (2015) <doi:10.1371/journal.pone.0118537>.
Robust estimators of covariance are implemented, including the Minimum Covariance Determinant (MCD) method of Hubert et al. (2018) <doi:10.1002/wics.1421>.
This approach reduces the influence of outliers.
barrel is particularly useful for multivariate ecological datasets, promoting reproducible, publication-quality ordination graphics with minimal effort.
| Version: |
0.1.0 |
| Imports: |
robustbase, ggplot2, stats, ggrepel, vegan, grid, rlang |
| Suggests: |
knitr, rmarkdown, testthat (≥ 3.0.0), vdiffr |
| Published: |
2025-11-03 |
| DOI: |
10.32614/CRAN.package.barrel (may not be active yet) |
| Author: |
Diego Barranco-Elena [aut, cre] |
| Maintainer: |
Diego Barranco-Elena <diego.barranco at udl.cat> |
| License: |
MIT + file LICENSE |
| NeedsCompilation: |
no |
| Language: |
en-US |
| Materials: |
README, NEWS |
| CRAN checks: |
barrel results |
Documentation:
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