I am using networkx (a python graph-drawing package) http://networkx.lanl.gov/index.html for one of my project. Though networkx is pretty cool, the display function kind of sucks due to number of cross edges. Is there a way to minimize cross edges in a graph? I mean an algorithm which can sort the nodes in a way such that cross edges are minimized?
Minimize Cross Edges in a Graph
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Determining a planar graph layout which minimizes the number of crossings is NP-Hard. See the wiki page on Crossing Number.
You could try some heuristics, force based layout are quite popular I believe (graphviz uses them, if I recollect correctly).
You could also try some approximation algorithms, you should find references on the wiki page I linked.
Hope that helps.