tang.conc: A test for testing the equality of the concentration...

In Directional: A Collection of Functions for Directional Data Analysis

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

This is an "htest"class object. Thus it returns a list including:

statistic	The test statistic value.
parameter	The degrees of freedom of the test.
p.value	The p-value of the test.
alternative	A character with the alternative hypothesis.
method	A character with the test used.
data.name	A character vector with two elements.

Author(s)

Michail Tsagris.

R implementation and documentation: Michail Tsagris [e-mail] and Giorgos Athineou <[e-mail]>.

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.

See Also

embed.circaov, hcf.circaov, lr.circaov, het.circaov, conc.test

Examples

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

Directional documentation built on Oct. 30, 2024, 9:15 a.m.