Simplical-Simplicial Spatial Median Regression for Compositional Data R package Compositionalscsmr version 1.0 Simplicial-simplicial regression is performed via the simplicially constrained spatial median regression model. The regression coefficients are constrained to be non-negative and sum to 1. For the spatial median regression the iteratively reweighted least squares algorithm is adopted, where quadratic programming is used to impose the constraints. Software Depends: R (>= 4.0) Imports: cluster, Compositional, graphics, MASS, Matrix, quadprog, rangen, Rfast, stats Suggests: Rfast2 Michail Tsagris <mtsagris@uoc.gr> Comprehensive R Archive Network (CRAN) Michail Tsagris [aut, cre] GPL (>= 2) 2026-09-12 application/tgz https://CRAN.R-project.org/package=Compositionalscsmr doi:10.32614/CRAN.package.Compositionalscsmr