spatial networks

I did some simple things trying to combine sp and igraph objects to
create spatial networks, and published this at:

http://rpubs.com/edzer/spatialnetworks

I'd be happy to share the markdown document with you; it seems to me
that the rpubs don't allow you to simply download & run all the commands
in the html.

Anyway, comments & discussion welcome, as usual.

Edzer Pebesma
Institute for Geoinformatics (ifgi), University of M?nster
Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251
83 33081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de