To cite package 'heplots' in publications use:

Michael Friendly and John Fox and Georges Monette (2026). heplots: Visualizing Tests in Multivariate Linear Models. R package version 1.8.3. URL https://CRAN.R-project.org/package=heplots

To refer to the theory on which this package is based, also cite:

Friendly, M. (2007). HE plots for Multivariate General Linear Models. Journal of Computational and Graphical Statistics, 2007, 16, 421-444

For use with repeated measures designs also cite:

Michael Friendly (2010). HE Plots for Repeated Measures Designs. Journal of Statistical Software, 37(4), 1-40.<doi:10.18637/jss.v037.i04>

BibTeX entries for LaTeX users: use ‘toBibtex(citation("heplots"))’

Corresponding BibTeX entries:

  @Manual{,
    title = {heplots: Visualizing Tests in Multivariate Linear Models},
    author = {Michael Friendly and John Fox and Georges Monette},
    year = {2026},
    note = {R package version 1.8.3},
    url = {https://CRAN.R-project.org/package=heplots},
  }

  @Article{,
    title = {HE plots for Multivariate General Linear Models},
    author = {Michael Friendly},
    year = {2007},
    journal = {Journal of Computational and Graphical Statistics},
    volume = {16},
    number = {4},
    pages = {421--444},
  }

  @Article{,
    title = {HE Plots for Repeated Measures Designs},
    author = {Michael Friendly},
    journal = {Journal of Statistical Software},
    year = {2010},
    volume = {37},
    number = {4},
    pages = {1--40},
    doi = {10.18637/jss.v037.i04},
  }