Directional

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.

Help pages

118includes a package overview page

Examples that run

94%110 run in a plain check · 7 only when donttest examples are enabled (R CMD check --as-cran)

Exported functions with examples

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Documented parameters

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Return-value docs

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Help pages citing references

96%

Installing Directional adds 85 packages (52 with compiled code, 82 MB of source tarballs). Heaviest: BH 14 MB, sf 9.3 MB, ggplot2 6.0 MB.

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First published

2015-11-12

Total releases

66 / 11 yrs

License

GPL (>= 2) OSI

Download size

165 KB

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