Directional: tang.conc – R documentation

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tang.conc

A test for testing the equality of the concentration parameter among g samples, where g >= 2 for ciruclar data

Description

A test for testing the equality of the concentration parameter among g samples, where g >= 2 for ciruclar data. It is a tangential approach.

Usage

tang.conc(u, ina, rads = FALSE)

Arguments

`u`	A numeric vector containing the values of all samples.
`ina`	A numerical variable or factor indicating the groups of each value.
`rads`	If the data are in radians this should be TRUE and FALSE otherwise.

Details

This test works for circular data.

Value

A vector including:

`test`	The value of the test statistic.
`p-value`	The p-value of the test.

Author(s)

Michail Tsagris

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

References

Mardia, K. V. and Jupp, P. E. (2000). Directional statistics. Chicester: John Wiley & Sons. Fisher, N. I. (1995). Statistical analysis of circular data. Cambridge University Press.

Examples

x <- rvonmises(100, 2.4, 15)
ina <- rep(1:4,each = 25)
tang.conc(x, ina, rads = TRUE)

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