On Mon, May 4, 2009 at 8:31 PM, jebyrnes <byr...@msi.ucsb.edu> wrote: > > Nearly. The algorithm turns up slightly different graphs each time (and > set.seed doesn't seem to make it consistent)
Hmmm, that should not happen, I'll check it out. > and periodically chokes. Can you send me the graph for which this happens? > But > better than what I had. Hrm. I don't know much about the algorithm > graphviz uses for dot. Do you have a reference on hand? No, I don't. Have you checked the graphviz homepage? > If it's simple, > I'd be willing to take a whack at it. I doubt that it is simple, but I think it would be very useful to have a free implementation. (I would have already ported the graphviz layout algorithms to igraph, but their licenses are not compatible.) Best, Gabor > > Gábor Csárdi-2 wrote: >> >> Jarrett, >> >> the 'igraph' package has a layout called layout.reingold.tilford that >> is designed for trees, there is a slight chance that it is good enough >> for you. >> >> Best, >> Gabor >> >> On Wed, Apr 29, 2009 at 10:11 PM, jebyrnes <byr...@msi.ucsb.edu> wrote: >>> >>> I've been using sna to work with some networks, and am trying to >>> visualize >>> them easily. My networks are hierarchical (food webs). All of the >>> layout >>> engines I've tried with gplot don't seem to plot hierarchical networks, >>> as >>> one would using dot from graphviz. While I could do all of this by >>> outputting to dotfiles and running it through graphviz, the graphics I >>> get >>> from R are much cleaner, and more easily integrated into my analyses. >>> >>> Is there any good way to diagram a hierarchical network in R, either with >>> the sna library or otherwise? It strikes me that at least the Netindices >>> package can calculate trophic levels. Could this be used for node >>> placement? >>> >>> >>> -Jarrett >>> -- >>> View this message in context: >>> http://www.nabble.com/Hierarchical-Diagram-of-Networks-in-sna-or-otherwise--tp23301819p23301819.html >>> Sent from the R help mailing list archive at Nabble.com. >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> >> >> -- >> Gabor Csardi <gabor.csa...@unil.ch> UNIL DGM >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> >> > > -- > View this message in context: > http://www.nabble.com/Hierarchical-Diagram-of-Networks-in-sna-or-otherwise--tp23301819p23374024.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Gabor Csardi <gabor.csa...@unil.ch> UNIL DGM ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
