Directional: kent.contour – R documentation

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kent.contour

Contour plot of the Kent distribution without any data

Description

The contour plot of the Kent distribution on the sphere is produced. The user can see how the shape and ovalness change as he/she changes the ovlaness parameter.

Usage

kent.contour(k, b)

Arguments

`k`	The concentration parameter.
`b`	The ovalness parameter. It has to be less than k/2 in order for the distribution to be unimodal. Otherwise it is bimodal.

Details

The goal of this function is for the user to see hwo the Kent distribution looks like.

Value

A plot containing the contours of the distribution.

Author(s)

Michail Tsagris

R implementation and documentation: Michail Tsagris mtsagris@uoc.gr and Giorgos Athineou <gioathineou@gmail.com>

References

Kent John (1982). The Fisher-Bingham distribution on the sphere. Journal of the Royal Statistical Society, Series B, 44(1): 71-80.

Examples

par( mfrow = c(1, 2) )
kent.contour(10, 2)
kent.contour(10, 4)

Directional

A Collection of R Functions for Directional Data Analysis

v4.9

GPL-2

Authors

Michail Tsagris, Giorgos Athineou, Anamul Sajib, Eli Amson, Micah J. Waldstein

Initial release

2021-03-26