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SimplexRegression: Simplex Regression Models with Parametric or Fixed Mean Link Functions

Fits and analyzes simplex regression models with either fixed or parametric mean link functions. Implements the simplex probability density function, cumulative distribution function, quantile function, random number generation, and variance evaluation. Offers several fixed and parametric link functions for the mean submodel, tools for residual analysis and diagnostic plotting, hypothesis testing procedures, and influence measures such as Cook's distance and leverage (hat values). Includes the Scout Score (SS) criterion for model selection, enabling comprehensive inference and diagnostic analysis within the simplex regression framework. For more details see Barndorff-Nielsen and Jorgensen (1991) <doi:10.1016/0047-259X(91)90008-P> and Justino and Cribari-Neto (2026) <doi:10.1016/j.apm.2025.116713>.

Version: 0.1.3
Depends: R (≥ 3.5)
Imports: Formula, lmtest, Matrix, pracma, sandwich
Suggests: knitr, moments, rmarkdown, spelling, testthat (≥ 3.0.0), tseries
Published: 2026-06-30
DOI: 10.32614/CRAN.package.SimplexRegression (may not be active yet)
Author: Maria Eduarda da Cruz Justino ORCID iD [aut, cre], Francisco Cribari-Neto ORCID iD [ctb, ths] (Theoretical foundations)
Maintainer: Maria Eduarda da Cruz Justino <eueduardacruz at gmail.com>
BugReports: https://github.com/dudajustino/SimplexRegression/issues
License: MIT + file LICENSE
URL: https://github.com/dudajustino/SimplexRegression
NeedsCompilation: no
Language: en-US
Materials: NEWS
CRAN checks: SimplexRegression results

Documentation:

Reference manual: SimplexRegression.html , SimplexRegression.pdf
Vignettes: relative-humidity (source, R code)

Downloads:

Package source: SimplexRegression_0.1.3.tar.gz
Windows binaries: r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries: r-release (arm64): SimplexRegression_0.1.3.tgz, r-oldrel (arm64): SimplexRegression_0.1.3.tgz, r-release (x86_64): SimplexRegression_0.1.3.tgz, r-oldrel (x86_64): SimplexRegression_0.1.3.tgz

Linking:

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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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