The Skew-Normal and Related Distributions Such as the Skew-t and the SUN R package sn version 2.1.3 CRAN Task View: Distributions (https://CRAN.R-project.org/view=Distributions) Build and manipulate probability distributions of the skew-normal family and some related ones, notably the skew-t and the SUN families. For the skew-normal and the skew-t distributions, statistical methods are provided for data fitting and model diagnostics, in the univariate and the multivariate case. Software Depends: R (>= 3.0.0), methods, stats4 Imports: mnormt (>= 2.0.0), numDeriv, utils, quantreg Suggests: R.rsp Adelchi Azzalini <adelchi.azzalini@unipd.it> Comprehensive R Archive Network (CRAN) Adelchi Azzalini [aut, cre] (ORCID: <https://orcid.org/0000-0002-7583-1269>) GPL-2 GPL-3 2026-02-24 application/tgz https://CRAN.R-project.org/package=sn doi:10.32614/CRAN.package.sn