Re: [igraph] extracting x y values from an igraph object to plot in ggplot

[Roey Angel]

Wow thanks for the rapid and very helpful reply, Gabor!
That's all I wanted to know.

Cheers,
Roey

On 06/11/2012 04:43 PM, Gábor Csárdi wrote:
> Hi,
>
> On Mon, Jun 11, 2012 at 10:36 AM, Roey Angel<address@hidden>  wrote:
> > Hi,
> > I'd like to extract the x y values from an igraph object in order to plot it
> > in ggplot (which accepts only data frames).
> there are not x y values in igraph objects, at least not by default.
>
> > Scott Chamberlain has published an attempt to plot igraph networks in ggplot
> > (http://schamberlain.github.com/2011/03/basic-ggplot2-network-graphs/) but
> > he's just generating random values for the position of the vertices (through
> > the vplace variable).
> > This works fine for small networks but makes a clutter in large networks
> > and, most importantly, doesn't allow drawing different layouts.
> You can generate layout coordinates by using one of the several layout
> functions, e.g.
> xy<- layout.fruchterman.reingold(mygraph)
>
> > The reason I'm insisting on ggplot (apart from the fact that this is what I
> > know best in R graphics) is because I'd like to have the vertices sized
> > according to a vector of numeric values and their colours according to a
> > character vector and that's done very easly in ggplot.
> This is actually quite easy without ggplot as well:
>
> G<- graph.ring(10)
> plot(G, vertex.size=1:10*2, vertex.color=rainbow(10), layout=layout.circle)
>
> Best,
> Gabor
>
> > I'm a beginner and trying to figure out my way in the world of networks and
> > igraph so there might be something very basic I'm missing out here.
> >
> > Thanks a lot in advance,
> > Roey
> >
> >
> > _______________________________________________
> > igraph-help mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/igraph-help

angel.vcf
Description: Vcard