Clustering and Simulation of Spherical Cauchy and PKBD Models R package circlus version 0.0.2 Provides tools for estimation and clustering of spherical data, seamlessly integrated with the 'flexmix' package. Includes the necessary M-step implementations for both Poisson Kernel-Based Distribution (PKBD) and spherical Cauchy distribution. Additionally, the package provides random number generators for PKBD and spherical Cauchy distribution. Methods are based on Golzy M., Markatou M. (2020) <doi:10.1080/10618600.2020.1740713>, Kato S., McCullagh P. (2020) <doi:10.3150/20-bej1222> and Sablica L., Hornik K., Leydold J. (2023) <doi:10.1214/23-ejs2149>. Software Depends: R (>= 3.1.0) Imports: Rcpp (>= 0.12.18), Tinflex (>= 1.8), flexmix, torch, methods LinkingTo: Rcpp, RcppArmadillo Lukas Sablica <lsablica@wu.ac.at> Comprehensive R Archive Network (CRAN) Lukas Sablica [aut, cre] (ORCID: <https://orcid.org/0000-0001-9166-4563>), Kurt Hornik [aut] (ORCID: <https://orcid.org/0000-0003-4198-9911>), Bettina Gruen [aut] (ORCID: <https://orcid.org/0000-0001-7265-4773>), Josef Leydold [aut] (ORCID: <https://orcid.org/0000-0002-9076-4893>) GPL-3 2025-02-19 application/tgz https://CRAN.R-project.org/package=circlus doi:10.32614/CRAN.package.circlus