This script creates random planar graphs, suitable as input to graphviz neato.
The simplest invocation is:
python GenerateGraph.py output.gv
which you could then render with:
neato -Tpng output.gv > output.png
Note that sometimes neato decides to pick a nonplanar embedding.
Try giving neato the -n1 argument to use the node coordinates specified by this script, which are always planar but might not look as pretty.
If you do, you might also want to specify -Nshape=circle to tell neato to use circular nodes. The default coordinates assume nodes are roughly circular.
You can read the help text for details on options:
python GenerateGraph.py --help
The most common options are:
--width SIZE: Width of the field on which to place points.neatomight choose a different width for the output image.--height SIZE: Height of the field on which to place points. As above,neatomight choose a different size.--nodes NUM: Number of nodes to place.--edges NUM: Number of edges to use for connections. Double edges aren't counted.--radius SIZE: Nodes will not be placed within this distance of each other. Default 40.--double CHANCE: Probability of an edge being doubled. Ranges from 0.00 to 1.00. Default 0.10.
neato -Tpng output.gv > output.pnggenerates erroneous png (wrong headers).
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