nbInlaToGraph: Write a graph file for INLA
In diseasemapping: Modelling Spatial Variation in Disease Risk for Areal Data

Description Usage Arguments Details Value Author(s) See Also Examples

Writes a graph file from an adjacency matrix suitable for use with INLA.

1	nbToInlaGraph(adjMat, graphFile="graph.dat")

`adjMat`	An object of class `nb` containing the adjacency matrix.
`graphFile`	name of file to save adjacency matrix to.

This function correctly handles regions which have zero neighbours.

A vector of names and indices

Patrick Brown

poly2nb, nb2INLA

data('kentucky')
# remove all the neighbours Ballard county
kSub = kentucky[-c(2,20,79),]

if( require("spdep", quietly=TRUE)) {


adjMat = poly2nb(
	kSub, 
	row.names=kSub$County,
	queen=FALSE
)

nFile = tempfile()
nbRes = nbToInlaGraph(adjMat, nFile)

# Ballard is region 3
nbRes['Ballard']
# note that Ballard has no neighbours
adjMat[[3]]

cat(readLines(nFile, n=5), sep='\n')

## Not run: 
# there will be a warning about zero neighbours
junk = bym(poverty ~ 1, data=kSub, family='gaussian')

## End(Not run)

}