Gspp: G-function for spherical point pattern

In rubak/spatstatsphere: Point patterns on the sphere for spatstat package

Description

G-function for spherical point pattern

Usage

Gspp(X, r = NULL, rmax = NULL, breaks = NULL, correction = NULL,
  lambda = NULL, unnormalized = FALSE, angular_arg = FALSE)

Arguments

X	Object of class "spp".
r	Optional. Vector of values for the argument r at which G(r) should be evaluated. Users are advised not to specify this argument; there is a sensible default. If necessary, specify rmax.
rmax	Optional. Maximum desired value of the argument r.
breaks	This argument is for internal use only.
correction	Optional. A character vector containing any selection of the options "none" and "border" (and possibly others in the future).
lambda	Intensity (usually not supplied). Estimated from data by default.
unnormalized	Logical. Only for internal use at the moment.
angular_arg	Logical. Interpret r values as angles (possibly in degrees rather than radians depending on coordinate type of X).
...	Ignored.

Value

An object of class "fv", see fv.object, which can be plotted directly using plot.fv.

Essentially a data frame containing columns

r	the vector of values of the argument r at which the function G has been estimated
theo	the theoretical value G(r) = 2 * pi * (1 - cos(r)) for a stationary Poisson process (where r is in radians)

together with columns named "none", and/or "border", according to the selected edge corrections. These columns contain estimates of the function G(r) obtained by the edge corrections named.

Examples

X <- runifspp(100)
G <- Gspp(X)

rubak/spatstatsphere documentation built on May 28, 2019, 9:56 a.m.