Directional (version 2.2)

MLe of the Kent distribution: MLe of the Kent distribution

Description

It estimates the concentration and the ovalness parameter of some directional data assuming the Kent distribution. The mean direction and major and minor axes are also estimated.

Usage

kent.mle(x)

Arguments

x

A matrix containing spherical data; in Euclidean coordinates.

Value

A list including: A list including:

Details

The Kent distribution is fitted to some data and its parameters are estimated.

References

Kent John (1982). The Fisher-Bingham distribution on the sphere. Journal of the Royal Statistical Society, Series B, 44(1): 71-80.

See Also

kent.mle, fb.saddle, vmf, wood.mle

Examples

x <- rvmf(200, rnorm(3), 15)
kent.mle(x)
vmf(x)
A <- diag( c(-5, 0, 5) )
x <- rfb(200, 15, rnorm(3), A)
kent.mle(x)
vmf(x)