Concentration parameter of von Mises distribution — est.kappa • tectonicr

Computes the maximum likelihood estimate of \(\kappa\), the concentration parameter of a von Mises distribution, given a set of angular measurements.

Usage

est.kappa(x, w = NULL, bias = FALSE, axial = TRUE)

Arguments

x: numeric. angles in degrees
w: numeric. weightings
bias: logical parameter determining whether a bias correction is used in the computation of the MLE. Default for bias is FALSE for no bias correction.
axial: logical. Whether the data are axial, i.e. pi-periodical (TRUE, the default) or directional, i.e. \(2 \pi\)-periodical (FALSE).

Value

numeric.

Examples

set.seed(123)
est.kappa(rvm(100, 90, 10), w = 1 / runif(100, 0, 10))
#> [1] 3.146673