[BioC] Rgraphviz: multiple edges between nodes
Hervé Pagès
hpages at fhcrc.org
Tue Sep 15 00:13:26 CEST 2009
Hi Rainer,
I've never used it and I don't know if it handles multiple edges between
a pair of nodes but AFAIK the igraph package (from CRAN) is an
alternative to Rgraphviz that you might want to try. Since this is not
a Bioconductor package, any questions about it should go to the R-help
mailing list or directly to the maintainer of the package.
Cheers,
H.
Rainer Machne wrote:
> Hi,
>
> Is it correct that Rgraphviz - unlike graphviz itself - currently can
> not handle multiple edges between a pair of nodes (example given below)?
>
> Are there any plans to allow for multiple edges in future versions, or
> it already possible with other commands then the ones used below?
>
> Rainer
>
>
> g <- new("graphNEL", edgemode="directed")
> g <- addNode(c("a", "b"), g)
> g <- addEdge("a", "b", g)
> g <- addEdge("a", "b", g)
>
> Warning message:
> In .local(from, to, graph) :
> The following edges already exist and will be replaced:
> a|b
>
>
> This is however possible in graphviz itself:
>
> file: multiedge.dot
>
> digraph {
> a->b;
> a->b;
> }
>
> and calling dot on commandline ("dot multiedge.dot -Tpng -o
> multiedge.png") produces the intended output wiht multiple edges.
>
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--
Hervé Pagès
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M2-B876
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Seattle, WA 98109-1024
E-mail: hpages at fhcrc.org
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