meandir.test: Test for a given mean direction

Description Usage Arguments Details Value Author(s) References See Also Examples

View source: R/meandir.test.R

Description

A log-likelihood ratio test for testing whether the sample mena direction is equal to some predefined one.

Usage

1
meandir.test(x, mu, B = 999)

Arguments

x

A matrix with the data, unit vectors.

mu

A unit vector with the hypothesized mean direction.

B

A number either 1, so no bootstrap calibration is performed or more than 1, so bootstrap calibration is performed.

Details

The log-likelihood ratio test is performed.

Value

A list including:

mean.dir

The sample mean direction

pvalue

The p-value of the test.

Author(s)

Michail Tsagris

R implementation and documentation: Michail Tsagris <[email protected]> and Giorgos Athineou <[email protected]>

References

Mardia, K. V. and Jupp, P. E. (2000). Directional statistics. Chicester: John Wiley & Sons.

See Also

vmf, kent.mle, rayleigh

Examples

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5
mu <- rnorm(5)
mu <- mu / sqrt( sum(mu^2) )
x <- rvmf(100, mu, 10)
meandir.test(x, mu, 1)
meandir.test(x, mu, 499)

Example output

$mean.dir
[1] -0.28847518 -0.76989934 -0.50762972 -0.24292473  0.08565465

$pvalue
[1] 0.8024124

$mean.dir
[1] -0.28847518 -0.76989934 -0.50762972 -0.24292473  0.08565465

$pvalue
[1] 0.796

Directional documentation built on March 19, 2018, 5:05 p.m.