R help - Mar 2009 - save the layout using igraph

Hi R users,

I am using built-in functions in  igraph package to draw networks . I need
to compare several network with exactly the same structure but with edge
hightlighted differently.  I am wondering if there is a way to save the
layout so that every graph will look the same as each other except for the
colors of edges. Or is there any parameter I can set for this purpose??

Thanks in advance, 
Shukai
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Shukai,

the layout functions return a matrix that you can supply as the
'layout' argument of the plotting functions, e.g.

g1 <- erdos.renyi.game(50,2/50)
lay <- layout.fruchterman.reingold(g1)
g2 <- delete.edges(g1, sample(ecount(g1), 30)-1)
plot(g1, layout=lay, vertex.size=10)
plot(g2, layout=lay, vertex.size=10)

Best,
Gabor

On Tue, Mar 3, 2009 at 8:37 PM, kevinchang <shukai at seas.upenn.edu>
wrote:
>
> Hi R users,
>
> I am using built-in functions in ?igraph package to draw networks . I need
> to compare several network with exactly the same structure but with edge
> hightlighted differently. ?I am wondering if there is a way to save the
> layout so that every graph will look the same as each other except for the
> colors of edges. Or is there any parameter I can set for this purpose??
>
> Thanks in advance,
> Shukai
> --
> View this message in context:
http://www.nabble.com/save-the-layout-using-igraph-tp22316155p22316155.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at 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.Csardi at unil.ch>     UNIL DGM