Parsimonious Ultrametric Gaussian Mixture Models R package PUGMM version 0.1.2 Parsimonious Ultrametric Gaussian Mixture Models via grouped coordinate ascent (equivalent to EM) algorithm characterized by the inspection of hierarchical relationships among variables via parsimonious extended ultrametric covariance structures. The methodologies are described in Cavicchia, Vichi, Zaccaria (2024) <doi:10.1007/s11222-024-10405-9>, (2022) <doi:10.1007/s11634-021-00488-x> and (2020) <doi:10.1007/s11634-020-00400-z>. Software Depends: R (>= 4.0) Imports: ClusterR, doParallel, foreach, igraph, ManlyMix, MASS, Matrix, mclust, mcompanion, ppclust, Rcpp LinkingTo: Rcpp Giorgia Zaccaria <giorgia.zaccaria@unimib.it> Comprehensive R Archive Network (CRAN) Giorgia Zaccaria [aut, cre] (ORCID: <https://orcid.org/0000-0001-9119-9104>), Carlo Cavicchia [aut] (ORCID: <https://orcid.org/0000-0003-1816-3521>), Lorenzo Balzotti [aut] (ORCID: <https://orcid.org/0000-0001-6191-9801>), Alexa A. Sochaniwsky [aut] (ORCID: <https://orcid.org/0009-0005-8043-5091>), Paul D. McNicholas [aut] (ORCID: <https://orcid.org/0000-0002-2482-523X>) MIT + file LICENSE (https://CRAN.R-project.org/package=PUGMM/LICENSE) 2025-10-23 application/tgz https://CRAN.R-project.org/package=PUGMM doi:10.32614/CRAN.package.PUGMM