nbtest {prabclus} | R Documentation |
Tests a list of neighboring regions for proper format. Neighborhood is tested for being symmetrical. Causes an error if tests fail.
nbtest(nblist, n.regions=length(nblist))
nblist |
A list with a component for
every region. The
components are vectors of integers indicating
neighboring regions. A region without neighbors (e.g., an island)
should be assigned a vector |
n.regions |
Number of regions. |
invisible{TRUE}
.
Christian Hennig chrish@stats.ucl.ac.uk http://www.homepages.ucl.ac.uk/~ucakche
data(nb) nbtest(nb) nb[[1]][1] <- 1 try(nbtest(nb))