R help - Oct 2007 - linewidth in Rgraphviz

I'm an Rgraphviz newbie trying to figure out how to do some things/whether
they are possible.
  Apparently graphviz does allow you to modify line widths of edges: see

https://mailman.research.att.com/pipermail/graphviz-interest/2001q2/000051.html

(although it looks a little obscure even in graphviz).  [As discussed in the
thread
above, the "weight" parameter in Rgraphviz sets the parameters of the
graph
layout
algorithm, NOT the linewidth of the edge itself.]

   I can probably figure this out given enough hours, but if someone were
able
to put together an example in a few minutes (or know that it's impossible
or very difficult) I would be grateful ...

  cheers
    Ben Bolker



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Hi Ben,
   Sorry for the slow reply, but something like this works,

          library(Rgraphviz)
          example(randomEGraph)
          x = plot(g1)
          xx = sapply(AgEdge(x), lines, lwd=2, len=1)

  there are other ways too - but this might be the easiest
  let me know if that does what you want...

   Robert

Ben Bolker wrote:
> 
>   I'm an Rgraphviz newbie trying to figure out how to do some
things/whether
> they are possible.
>   Apparently graphviz does allow you to modify line widths of edges: see
> 
>
https://mailman.research.att.com/pipermail/graphviz-interest/2001q2/000051.html
> 
> (although it looks a little obscure even in graphviz).  [As discussed in
the
> thread
> above, the "weight" parameter in Rgraphviz sets the parameters of
the graph
> layout
> algorithm, NOT the linewidth of the edge itself.]
> 
>    I can probably figure this out given enough hours, but if someone were
> able
> to put together an example in a few minutes (or know that it's
impossible
> or very difficult) I would be grateful ...
> 
>   cheers
>     Ben Bolker
> 
> 
> 
-- 
Robert Gentleman, PhD
Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M2-B876
PO Box 19024
Seattle, Washington 98109-1024
206-667-7700
rgentlem at fhcrc.org