| read.gra {BayesX} | R Documentation |
Reads the geographical information provided in a file in graph format (see Ch. 5 of the BayesX Reference Manual) and stores it in a map object.
read.gra(file, sorted=FALSE)
file |
Name of the graph file to be read. |
sorted |
Should the regions be ordered by the numbers speciying the region names (sorted=TRUE)? |
Returns an adjacency matrix that represents the neighborhood structure defined in the graph file. Additional attributes are
dim |
Dimension of the (square) adjacency matrix. |
dimnames |
List of region names corresponding to rows and columns of the adjacency matrix. |
class |
Indicates whether the map is stored in boundary format (bnd) or graph format (gra). Maps returned by read.gra are of class gra |
Thomas Kneib, Felix Heinzl
BayesX Reference Manual. Available from http://www.stat.uni-muenchen.de/~bayesx/
write.gra,read.bnd,write.bnd,get.neighbor,add.neighbor,delete.neighbor
germany <- read.gra(system.file("examples/germany.gra", package="BayesX"))
attributes(germany)