listw2sn {spdep} | R Documentation |
The function makes a "spatial neighbour"
object representation
(similar to the S-PLUS spatial statististics module representation of a
"listw"
spatial weights object. sn2listw()
is the inverse function to listw2sn()
, creating a "listw"
object from a "spatial neighbour"
object. The as.spam.listw
method converts a "listw"
object to a sparse matrix as defined in the spam package, using listw2sn()
.
listw2sn(listw) sn2listw(sn) as.spam.listw(listw)
listw |
a |
sn |
a |
listw2sn()
returns a data frame with three columns, and with class spatial.neighbour
:
from |
region number id for the start of the link (S-PLUS row.id) |
to |
region number id for the end of the link (S-PLUS col.id) |
weights |
weight for this link |
Roger Bivand Roger.Bivand@nhh.no
example(columbus) col.listw <- nb2listw(col.gal.nb) col.listw$neighbours[[1]] col.listw$weights[[1]] col.sn <- listw2sn(col.listw) str(col.sn) ## Not run: col.sp <- as.spam.listw(col.listw) str(col.sp) ## End(Not run)