Package: watson
Type: Package
Title: Fitting and Simulating Mixtures of Watson Distributions
Version: 1.0.0
Authors@R: c(
    person("Lukas", "Sablica", email = "lsablica@wu.ac.at", role = c("aut", "cre"),
           comment = c(ORCID = "0000-0001-9166-4563")), 
    person("Kurt", "Hornik", email = "Kurt.Hornik@wu.ac.at", role = "aut",
           comment = c(ORCID = "0000-0003-4198-9911")),
    person("Josef", "Leydold", email = "Josef.Leydold@wu.ac.at", role = "aut",
           comment = c(ORCID = "0000-0002-9076-4893")),
    person("Gerard", "Jungman", role = c("ctb","cph"), comment = "Author and copyright holder of included GNU GSL code"),
    person("Brian", "Gough", role = c("ctb","cph"), comment = "Author and copyright holder of included GNU GSL code")
  )
Maintainer: Lukas Sablica <lsablica@wu.ac.at>
Description: Tools for fitting and simulating mixtures of Watson
        distributions. The package is described in Sablica, Hornik and
        Leydold (2026) <doi:10.18637/jss.v115.i04>. The random sampling
        scheme of the package offers two sampling algorithms that are
        based of the results of Sablica, Hornik and Leydold (2022)
        <doi:10.1080/10618600.2024.2416521>. What is more, the package
        offers a smart tool to combine these two methods, and based on
        the selected parameters, it approximates the relative sampling
        speed for both methods and picks the faster one. In addition,
        the package offers a fitting function for the mixtures of
        Watson distribution, that uses the expectation-maximization
        (EM) algorithm. Special features are the possibility to use
        multiple variants of the E-step and M-step, sparse matrices for
        the data representation and state of the art methods for
        numerical evaluation of needed special functions using the
        results of Sablica and Hornik (2022) <doi:10.1090/mcom/3690>
        and Sablica and Hornik (2024) <doi:10.1016/j.jmaa.2024.128262>.
License: GPL-3
Encoding: UTF-8
Imports: Rcpp (>= 0.12.18), Tinflex (>= 1.8)
LinkingTo: Rcpp, RcppArmadillo, Tinflex
URL: https://github.com/lsablica/watson
BugReports: https://github.com/lsablica/watson/issues
RoxygenNote: 7.3.3
Depends: R (>= 3.5.0)
Suggests: HSAUR3, testthat (>= 3.0.0)
Config/testthat/edition: 3
Repository: https://lsablica.r-universe.dev
Date/Publication: 2026-01-19 15:41:34 UTC
RemoteUrl: https://github.com/lsablica/watson
RemoteRef: HEAD
RemoteSha: e5e56e52c9ebf38fb8860d3a9195ba685201bcf0
NeedsCompilation: yes
Packaged: 2026-10-17 06:37:29 UTC; root
Author: Lukas Sablica [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-9166-4563>),
  Kurt Hornik [aut] (ORCID: <https://orcid.org/0000-0003-4198-9911>),
  Josef Leydold [aut] (ORCID: <https://orcid.org/0000-0002-9076-4893>),
  Gerard Jungman [ctb, cph] (Author and copyright holder of included GNU
    GSL code),
  Brian Gough [ctb, cph] (Author and copyright holder of included GNU GSL
    code)