Representing large graphs

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1

Hi
I had a graph with about 20 vertices and about 100K edges. When I run the dot command I get the following error messages regarding the size of the graph and then a 16MB PNG is generated which I can not zoom into that to get information.

>dot -T png my_dot.txt -o my_dot.png
Error: Edge length 88795.000000 larger than maximum 65535 allowed.
Check for overwide node(s).
Error: Edge length 93134.000000 larger than maximum 65535 allowed.
Check for overwide node(s).
Error: Edge length 92711.000000 larger than maximum 65535 allowed.
Check for overwide node(s).
Error: Edge length 93134.000000 larger than maximum 65535 allowed.
Check for overwide node(s).
Error: Edge length 66125.000000 larger than maximum 65535 allowed.
Check for overwide node(s).
Error: Edge length 66125.000000 larger than maximum 65535 allowed.
Check for overwide node(s).
dot: graph is too large for cairo-renderer bitmaps. Scaling by 0.0484215 to fit

The output is shown in the picture.
Is there any way to better show that graph? I mean interactive behavior for zooming in or out?

Untitled
Untitled1255×153 14.2 KB

2

I don’t know if it has the capacity to show 100K edges, but you could try:

3

OK it seems that I can use PDF format which is better for large graphs.

4

I’d suggest trying SVG. It is cleaner than PDF (smaller? text-based files with less huge-document baggage).
Any way you cut it, an average of 10,000 edges/node is a challenge.
You might also try some of the other engines - fdp, neato, sfdp, circo, twopi - for fun if no other reason.