Shukai,
the force based layout algorithms (layout.drl,
layout.fruchterman.reingold, layout.graphopt, layout.kamada.kawai) are
likely to do this; although they are not explicitly required to place
hubs in the center, usually they do.
I am not sure what is the "correlation between two nodes". You mean
that the graph is weighted?
If you have a small graph, then you can refine the layout
interactively by using 'tkplot'.
Gabor
On Thu, Feb 26, 2009 at 4:20 PM, kevinchang <shukai at seas.upenn.edu>
wrote:>
> Dear R users,
>
> I am trying to draw a network using igraph package. I intend to place the
> hub nodes (the ones with the relatively more connection with other nodes)
in
> the center of the graph. ?Also, the graph need to be in the fashion that
the
> higher the correlation between two nodes is , the closer the two nodes will
> be. ?Is there any layout that can help or any other way to do this?
>
> Thanks in advance.
> Shukai
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--
Gabor Csardi <Gabor.Csardi at unil.ch> UNIL DGM