| A test for testing the equality of the concentration parameters for ciruclar data {Directional} | R Documentation |
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 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.
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)