Constructing the adjacency graph
of the administrative districts of Germany
Usage
adjacency.landkreis( loc)
Arguments
loc
location of the graph structure, can be an URL.
Details
The function is included as an example on how to
construct adjacency matrices form a (common) adjacency structure.
For the particular example, note that the nodes are not numbered
consecutively and that they start from zero.
Value
a sparse matrix in spam format.
Author(s)
Reinhard Furrer
References
The adjacency data has been provided by Havard Rue and is
also available in INLA.
See Also
germany.plot super-seeding map.landkreis
for plotting. Oral.
Examples
## Not run:
loc <- system.file("demodata/germany.adjacency", package="spam")
display( adjacency.landkreis( loc))
## End(Not run)