To cite ridgetorus in publications use:

García-Portugués E, Prieto-Tirado A (2025). ridgetorus: PCA on the Torus via Density Ridges. R package version 1.0.3, https://github.com/egarpor/ridgetorus.

García-Portugués E, Prieto-Tirado A (2023). “Toroidal PCA via density ridges.” Statistics and Computing, 33(5), 107. https://doi.org/10.1007/s11222-023-10273-9.

Corresponding BibTeX entries:

  @Manual{,
    title = {{ridgetorus}: {PCA} on the Torus via Density Ridges},
    author = {Eduardo García-Portugués and Arturo Prieto-Tirado},
    year = {2025},
    note = {R package version 1.0.3},
    url = {https://github.com/egarpor/ridgetorus},
  }

  @Article{,
    title = {Toroidal {PCA} via density ridges},
    author = {Eduardo García-Portugués and Arturo Prieto-Tirado},
    journal = {Statistics and Computing},
    year = {2023},
    volume = {33},
    number = {5},
    pages = {107},
    url = {https://doi.org/10.1007/s11222-023-10273-9},
  }