BayesX: read.gra – R documentation

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read.gra

Read Geographical Information in Graph Format

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.bayesx.org/

germany <- read.gra(system.file("examples/germany.gra", package="BayesX"))
attributes(germany)

R Utilities Accompanying the Software Package BayesX

v0.3-1

GPL-2 | GPL-3

Authors

Nikolaus Umlauf [aut, cre], Thomas Kneib [aut], Nadja Klein [aut], Felix Heinzl [ctb], Andreas Brezger [ctb], Daniel Sabanes Bove [ctb]

Initial release

2019-08-23