Write a neighbours list as a GAL lattice file

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

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

Arguments

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

Author

Roger Bivand Roger.Bivand@nhh.no

See also

read.gal

Examples

col.gal.nb <- read.gal(system.file("weights/columbus.gal", package="spData")[1])
GALfile <- tempfile("GAL")
write.nb.gal(col.gal.nb, GALfile)
col.queen <- read.gal(GALfile)
summary(diffnb(col.queen, col.gal.nb))
#> 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