Re: [igraph] Plotting a signed and directed graph

[Tom Backer Johnsen]

Thanks for the detailed response!  And fast as well.  I'll look into it.

Tom

Gábor Csárdi wrote:
> Tom,
>
> it is possible, with 0.5.2 or later versions. (Because of the curved
> edges.) 0.5.2 will be on CRAN at any time, in the meanwhile it is
> here:
>
> http://cneurocvs.rmki.kfki.hu/igraph/download/igraph_0.5.2.tar.gz
> http://cneurocvs.rmki.kfki.hu/igraph/download/igraph_0.5.2.zip
>
> The latter is for windows. Here is how to do it:
>
> library(igraph)
>
> # just to always get the same nice picture
> set.seed(123)
>
> # a small directed random graph to test
> g <- random.graph.game(10, 20, type="gnm", directed=TRUE)
>
> # signs are random, too
> E(g)$sign <- sample( c(-1,1), ecount(g), replace=TRUE)
>
> # mutual edges are curved
> E(g)$curved <- is.mutual(g)
>
> # -1 edges are dashed
> E(g)$lty <- ifelse( E(g)$sign > 0, 1, 2)
>
> # A nice layout
> coords <- layout.fruchterman.reingold(g)
>
> # And the plot
> plot(g, layout=coords)
>
> Best,
> Gabor
>
> On Tue, Apr 14, 2009 at 10:43 AM, Tom Backer Johnsen
> <address@hidden> wrote:
> > Gentlepersons:
> >
> > I would like to obtain a plot of a signed and directed graph.  The graph is
> > small, 10 nodes or vertices.  Since the graph is directed, I would like to
> > have a curved arrow if there are arcs in both directions, with continuous
> > leines and dashed for the negative ones. After reading the graph (containing
> > -1's zeroes, and +1's) I see that I can plot a directed graph using g <- as
> > directed (g) and then plot (g).
> >
> > Is this possible?
> >
> > Tom
> >
> >
> >
> > _______________________________________________
> > igraph-help mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/igraph-help


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| Tom Backer Johnsen, Psychometrics Unit,  Faculty of Psychology |
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