how to compartmentalize a big graph using twopi

Question

I have a rather large graph in DOT, which I render using neato and I'm more or less able to distinguish its main clusters using a lot of len=... attributes.

I wanted to experiment with twopi, because I like a lot the way it renders, but I see that it doesnt support len.

There are alternatives? My need is to manually keep some portions of the graph rather isolated from others, to enhance readability. I tried with clusters but apparently the results are not so good.

Answer 1

With twopi, you specify a root then the number of edges away from root will dictate which ring of the circle it belongs on. Another alternative you might also consider is circo which is yet another graphing tool from graphviz.