exporting weiths matrix in .txt-file in spdep


Hi,

I have created a row-standardized spatial weigths matrix in spdep and 
wonder how it can be transformed to a simple .txt-file for export to other 
programs or simply visualisation of the weights matrix in form of rows and 
columns. Does anybody have a clue how to write out a weights matrix in spdep?
For example:
library(spdep)
data(columbus)
colnbMat <- nb2mat(col.gal.nb, style="B")
str(colnbMat)
num [1:49, 1:49] 0 1 1 0 0 0 0 0 0 0 ...
 - attr(*, "dimnames")=List of 2
  ..$ : chr [1:49] "1005" "1001" "1006" "1002" ...
  ..$ : NULL
 - attr(*, "call")= language nb2mat(neighbours = col.gal.nb, style = "B")
library(MASS)
mattmp <- tempfile()
write.matrix(colnbMat, file=mattmp)
system(paste("cat", mattmp))
0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
....

For visualisation, this is nice, and scales to largish n:
image(asMatrixCsrListw(nb2listw(col.gal.nb, style="B")))
Roger
Best regards

Mario Gellrich
--------------------------------------------------
Mario Gellrich
Swiss Federal Research Institute WSL
Economics Section
Z?rcherstrasse 111
CH-8903 Birmensdorf
Tel:       ++41 (0)1 739 2520
Fax:       ++41 (0)1 739 22 15
e-mail:    mario.gellrich at wsl.ch
Web: http://www.wsl.ch/phonebook/STAFF/2409.ehtml

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Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no

exporting weiths matrix in .txt-file in spdep

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