Hex92: Global Hexagonal Grids

In SphericalK: Spherical K-Function

Description

The points are produced by a hexagonal tessellation at a resolution of 92 grid locations to evaluate the point-pattern properties.

Usage

data(Hex92)

Format

A data frame with 92 observations on the following 3 variables.

number

a numeric vector

longitude

a numeric vector

latitude

a numeric vector

See Also

sphere_montekhat, sphere_khat

Examples

#Spherical K function (minus CSR) with 90% confidence intervals
#for point patterns associated with 92 points global hexagonal grid

data(Hex92)
lath92<-Hex92[,3]
lonh92<-Hex92[,2]
d<-seq(from=0,to=pi,by=0.35)
nd<-length(d)
d[nd]<-pi
khatsh92<-sphere_khat(lath92,lonh92,d)
Kcih92<-sphere_montekhat(92,50,d)
plot(d,khatsh92,type='n', ylim=c(-0.4,0.4),xlim=c(0,pi),xaxt = "n",
     ylab = expression(K - CSR),xlab = expression("Spherical Angle"))
axis(1, at = c(0,pi/6, pi/3, pi/2, 2*pi/3, 5*pi/6, pi),
     labels = expression(0,pi/6, pi/3, pi/2, 2*pi/3, 5*pi/6, pi))
polygon(c(d, rev(d)), c(Kcih92[3,], rev(Kcih92[47,])),col = "grey79", border = FALSE)
lines(d,khatsh92,col = 4, lwd=2)
lines(y=c(0,0),x=c(0,pi),type='l',lty=2,lwd=2)

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