Directed Graph generator

On 1/4/07, Dave < omgroflzgmail.com"> omgroflzgmail.com> wrote:

I have two projects on my plate where the underlying data model is a
directed graph (a node object has a path/relationship to another node
object; http://en.wikipedia.org/wiki/Graph_(mathematics) for non-math
people). I've been successful in implementing Self Referential
many-to-many relationships to provide the structure
(http://www.railsweenie.com/forums/2/topics/768), but I also need
visualization, something that can display the entire graph on a huge
SVG. We're also talking thousands of nodes with plenty of edges as
well, so it has to be something that can handle a lot of data well.

Does anyone know a good Ruby library that can draw a directed graph
well? Alternatively, any library that runs on linux and generates a
nice looking graph. No, I'm not looking for charts like the Gruff
library.

Appreciate any pointers...

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