kdesph: Spherical kernel density
In adchSTATS/spatstatsphadd: Additions to spatstat

Description Usage Arguments Details Value Author(s)

Function for calculating the dentisty at a location x given in longitudinal and colattitudinal angles

1	kdesph(x, kappa, obs, first = "long")

`x`	A numeric vector of length 2 (may be longer but only the first two entries are used). Should represent a point on the sphere for which we want to calculate the density. Given by longitude (should range from 0 to 2 * pi) and colatitude (should range from 0 to pi).
`kappa`	A consentration parameter
`obs`	A dataframe with columns `long` and `lat`. The observed point pattern on the sphere. Given by longitude (should range from 0 to 2 * pi) and colatitude (should range from 0 to pi).
`first`	A parameter indicating whether the first entry of `X` is the longitude or colatitude.

This method corresponds to a mixture of Von-Mises Fisher distributions, with each observed point constituting the mean of a Von-Mises Fisher distribution, all with the same consentration parameter kappa.

A numeric of lenght 1. The density at point X.

Andreas Christoffersen andreas@math.aau.dk

adchSTATS/spatstatsphadd documentation built on May 28, 2019, 3:54 p.m.