[R--gR] Graph computations

[DED (David George Edwards)]

Dear all

More remarks:

1. Perhaps a class hierarchy, with
      general graphs (any link type, node type, perhaps multiple links
between nodes)
           / directed
              / DAGS 
           / undirected
           / mixed
              / chain graphs
      ..
   
2. The visual display should apply to general graphs, as could simple
   functions like node.set. Most functions though specific to the type of
graph.

3. Lots of work has been done on display, see eg
http://www.absint.com/aisee/

Regards
David