zambia_graph: Prior precision matrix for spatial variable in Zambia data set
Description
This is a 57x57 matrix containing row- and columwise the regions of Zambia, and the entries
define the neighbourhoodstructure. The corresponding map sambia.bnd can be downloaded from http://www.stat.uni-muenchen.de/~kneib/regressionsbuch/daten_e.html.
from the bnd file the prior precision matrix is obtained by
library(BayesX)
map <- read.bnd("zambia.bnd")
K <- bnd2gra(map)