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Re: [igraph] Plotting an ancestral graph

From: Gábor Csárdi
Subject: Re: [igraph] Plotting an ancestral graph
Date: Mon, 14 Jun 2010 12:54:04 +0200

Hi Alexander,

On Mon, Jun 14, 2010 at 12:17 PM, Alexander Savi <address@hidden> wrote:

> I use iGraph in R for plotting the undirected adjacencies between variables
> (o --- o) and the colliders (--> o <--). It seems to me that in iGraph it is
> not possible to plot a graph with both directed and undirected edges (I
> think it is called an ancestral graph and I think Pearl calls it a
> rudimentary pattern).

This is possible, see ?igraph.plotting and the 'edge.arrow.mode' parameter:

g <- graph.ring(10)
plot(g, layout=layout.circle, edge.arrow.mode=rep(0:3, length=ecount(g)))

Best Regards,


Gabor Csardi <address@hidden>     UNIL DGM

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