Package: Directional
Type: Package
Title: A Collection of Functions for Directional Data Analysis
Version: 7.9
Date: 2026-10-05
Authors@R: c( person(given = "Michail", family = "Tsagris", role = c("aut", "cre"), email = "mtsagris@uoc.gr"),
               person(given = "Giorgos", family = "Athineou", role = "aut"), 
               person(given = "Christos", family = "Adam", role = "aut"),
               person(given = "Zehao", family = "Yu", role = "aut"),
               person(given = "Anamul", family = "Sajib", role = "ctb"),
               person(given = "Eli", family = "Amson", role = "ctb"),
               person(given = c("Micah", "J."), family = "Waldstein", role = "ctb"),
               person(given = "Panagiotis", family = "Papastamoulis", role = "ctb") )
Maintainer: Michail Tsagris <mtsagris@uoc.gr>
Description: A collection of functions for directional data (including
        massive data, with millions of observations) analysis.
        Hypothesis testing, discriminant and regression analysis, MLE
        of distributions and more are included. The standard textbook
        for such data is the "Directional Statistics" by Mardia, K. V.
        and Jupp, P. E. (2000). Other references include: a) Paine
        J.P., Preston S.P., Tsagris M. and Wood A.T.A. (2018). "An
        elliptically symmetric angular Gaussian distribution".
        Statistics and Computing 28(3): 689-697.
        <doi:10.1007/s11222-017-9756-4>. b) Tsagris M. and Alenazi A.
        (2019). "Comparison of discriminant analysis methods on the
        sphere". Communications in Statistics: Case Studies, Data
        Analysis and Applications 5(4):467--491.
        <doi:10.1080/23737484.2019.1684854>. c) Paine J.P., Preston
        S.P., Tsagris M. and Wood A.T.A. (2020). "Spherical regression
        models with general covariates and anisotropic errors".
        Statistics and Computing 30(1): 153--165.
        <doi:10.1007/s11222-019-09872-2>. d) Tsagris M. and Alenazi A.
        (2024). "An investigation of hypothesis testing procedures for
        circular and spherical mean vectors". Communications in
        Statistics-Simulation and Computation, 53(3): 1387--1408.
        <doi:10.1080/03610918.2022.2045499>. e) Yu Z. and Huang X.
        (2024). A new parameterization for elliptically symmetric
        angular Gaussian distributions of arbitrary dimension.
        Electronic Journal of Statistics, 18(1): 301--334.
        <doi:10.1214/23-EJS2210>. f) Tsagris M. and Alzeley O. (2025).
        "Circular and spherical projected Cauchy distributions: A Novel
        Framework for Circular and Directional Data Modeling".
        Australian & New Zealand Journal of Statistics, 67(1): 77--103.
        <doi:10.1111/anzs.12434>. g) Tsagris M., Papastamoulis P. and
        Kato S. (2025). "Directional data analysis: spherical Cauchy or
        Poisson kernel-based distribution". Statistics and Computing,
        35:51. <doi:10.1007/s11222-025-10583-0>. h) Alzeley O. and
        Tsagris (2026). "On the generalized circular projected Cauchy
        distribution". Mathematics, 14(11): 1934.
        <doi:10.3390/math14111934>.
License: GPL (>= 2)
Imports: bigstatsr, doParallel, foreach, ggplot2, grDevices, magrittr,
        parallel, Rfast, Rfast2, Rnanoflann, rangen, rgl,
        rnaturalearth, sf
Suggests: bigreadr
RoxygenNote: 6.1.1
NeedsCompilation: no
Packaged: 2026-10-05 16:21:02 UTC; root
Author: Michail Tsagris [aut, cre], Giorgos Athineou [aut], Christos
        Adam [aut], Zehao Yu [aut], Anamul Sajib [ctb], Eli Amson
        [ctb], Micah J. Waldstein [ctb], Panagiotis Papastamoulis [ctb]
Repository: https://cran.r-universe.dev
Date/Publication: 2026-10-05 16:11:24 UTC
RemoteUrl: https://github.com/cran/Directional
RemoteRef: HEAD
RemoteSha: bb011ad6c64a6593d5110dce1b669725cb1b2239
Built: R 4.6.0; ; 2026-10-05 16:24:32 UTC; unix
