createxymap {BayesX} | R Documentation |
Creates a map object from a list of coordinates by treating observations within a certain distance as neighbors. The resulting neighborhood structure is stored in a map object in graph format while a map in boundary format is created to enable visualisation.
createxymap(x, y, districts=NULL, p=2, max.dist)
x |
Vector of x-coordinates of underlying points |
y |
Vector of y-coordinates of underlying points |
districts |
Either |
p |
Any p-norm with p>=1 can be chosen as the distance measure with the Euclidian distance ( |
max.dist |
Value which determines the neighborship. Points whose distance is smaller or equal than |
List of two elements: map object in graph format and map object in boundary format.
Felix Heinzl, Thomas Kneib
x <- c(3,3,5,9.5,11,11) y <- c(2,4,4,6,4.5,5) xymap <- createxymap(x, y, districts=c("A","B","C","D","E","F"), max.dist=2) xymap$gra drawmap(map=xymap$bnd)