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

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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

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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@yahoo.gr> and Giorgos Athineou <athineou@csd.uoc.gr>

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

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

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