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Using Mathematica to plot graphs and subgraphs with annotations?

• To: mathgroup at smc.vnet.net
• Subject: [mg102720] Using Mathematica to plot graphs and subgraphs with annotations?
• From: Erik Max Francis <max at alcyone.com>
• Date: Sat, 22 Aug 2009 03:35:49 -0400 (EDT)

Any suggestions for approaches (or modules) for using Mathematica to 
draw graph displays of complicated graphs with a few subsets of 
(identified) nodes that are part of subgraphs, which tend to have more 
relationships with each other than the general groups, and can be 
identified as such (say, by putting them all within a 
rectangle/circle/oval with the possibility of giving the subgroup a name 
and a short description)?

I'm looking to take fairly complicated graphs and give Mathematica hints 
of what to separate out and emphasize as more related than others, 
rather than just hoping for adjacency.  Any suggestions for good tools 
to help with this?  I didn't see anything obvious in Mathematica itself.

Thanks!

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 18 N 121 57 W && AIM/Y!M/Skype erikmaxfrancis
   No man who needs a monument ever ought to have one.
    -- Nathaniel Hawthorne