Auxiliary script rSpecialMC
The auxiliary script rSpecialMC.R below is loaded in the R code for chapter 12.
The chapter R code assumes that the script is placed in a subdirectory ‘R’ of the current working directory.
You can download the script here.
## rSpecialMC.R
## Code for generating simulated realisations of Matern Cluster process
## retaining all relevant parents and offspring
## For making illustrations only!
## Copyright (C) 2015 Adrian Baddeley, Ege Rubak and Rolf Turner
rSpecialMC <- local({
rundisk <- function(n, radius) {
R <- radius * sqrt(runif(n, min=0, max=1))
Theta <- runif(n, min=0, max=2*pi)
cbind(R * cos(Theta), R * sin(Theta))
}
function (kappa, scale, mu, win = owin(c(0, 1), c(0, 1)), nsim = 1,
drop = TRUE, saveLambda = FALSE, expand = scale, allkids = FALSE, ...)
{
if (missing(scale))
scale <- list(...)$r
check.1.real(scale)
stopifnot(scale > 0)
result <- rSpecialNS(kappa, scale, list(mu, rundisk), win,
radius = scale, nsim = nsim, drop = FALSE,allkids=allkids)
if (saveLambda) {
for (i in 1:nsim) {
parents <- attr(result[[i]], "parents")
Lambda <- clusterfield("MatClust", parents, scale = scale,
mu = mu, ...)
attr(result[[i]], "Lambda") <- Lambda[win]
}
}
return(if (nsim == 1 && drop) result[[1]] else result)
}})