sphere_khat: Calculate Spherical K-Function

In SphericalK: Spherical K-Function

Description

Main function to obtain spherical K-function for point-pattern analysis on the sphere.

Usage

sphere_khat(latitudes, longitudes, dis)

Arguments

latitudes	Latitudes of observed points on the sphere in degrees
longitudes	Longitudes of observed points on the sphere in degrees
dis	Vector of values for the argument r (from 0 to pi), at which K(r) is evaluated. By default, dis = seq(from=0,to=pi,by=0.1).

Value

Khats Estimated values of K-function

References

Robeson, S.M., Li, A., Huang, C., 2014. Point-pattern analysis on the sphere. Spatial Statistics. 10, 76-86.

See Also

sphere_montekhat

Examples

lat<-sphere_random(100)$latitudes; lon<-sphere_random(100)$longitudes
d<-seq(from=0,to=pi,by=0.1)
sphere_khat(lat,lon,d)

Example output

 [1]  0.0000000000  0.0168447986 -0.0008510095 -0.0166083994 -0.0085655425
 [6] -0.0583464440 -0.0413658343 -0.0990473372 -0.1031988292 -0.1231639594
[11] -0.0958389943 -0.0618153720 -0.0359590063 -0.1242430695 -0.0389210234
[16] -0.0480452355  0.0043948845 -0.0251076678 -0.0287508008 -0.0511328869
[21]  0.0356341133  0.0038229466 -0.0724540505 -0.0914759497 -0.0382054375
[26]  0.0080464160  0.0233565302  0.0137632184  0.0431564882  0.0580808542
[31]  0.0273377481  0.0000000000

SphericalK documentation built on May 2, 2019, 1:30 p.m.