write.nb.gal: Write a neighbours list as a GAL lattice file
In spdep: Spatial Dependence: Weighting Schemes, Statistics and Models

Description Usage Arguments Author(s) See Also Examples

Write a neighbours list as a GAL lattice file, may also use newer GeoDa header format

1	write.nb.gal(nb, file, oldstyle=TRUE, shpfile=NULL, ind=NULL)

`nb`	an object of class `nb` with a list of integer vectors containing neighbour region number ids.
`file`	name of file with GAL lattice data
`oldstyle`	if TRUE, first line of file contains only number of spatial units, if FALSE, uses newer GeoDa style
`shpfile`	Shapefile name taken from GAL file for this dataset
`ind`	region id indicator variable name

Roger Bivand Roger.Bivand@nhh.no

read.gal

example(columbus)
GALfile <- tempfile("GAL")
write.nb.gal(col.gal.nb, GALfile)
col.queen <- read.gal(GALfile)
summary(diffnb(col.queen, col.gal.nb))

Loading required package: sp
Loading required package: Matrix

colmbs> require(maptools)
Loading required package: maptools
Checking rgeos availability: TRUE

colmbs> columbus <- readShapePoly(system.file("etc/shapes/columbus.shp",
colmbs+  package="spdep")[1])

colmbs> col.gal.nb <- read.gal(system.file("etc/weights/columbus.gal",
colmbs+  package="spdep")[1])
Warning message:
use rgdal::readOGR or sf::st_read 
Neighbour list object:
Number of regions: 49 
Number of nonzero links: 0 
Percentage nonzero weights: 0 
Average number of links: 0 
49 regions with no links:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
Link number distribution:

 0 
49