Kent (FB5) density on the sphere
Usage
KentDens(x, kappa, beta, g1 = c(0, 0, 1), g2 = c(1, 0, 0), g3 = c(0, 1, 0))
Arguments
- x
Unit 3-vector or matrix of them.
- kappa, beta
Concentration and ovalness.
- g1, g2, g3
Orthonormal axes.
Value
list(pdf, logpdf, log_normalizer).
References
Kent, J. T. (1982). JRSS B 44, 71-80.
Examples
KentDens(c(0, 0, 1), 2, 0.5)$pdf
#> [1] 0.3164894
