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2014-02-17 15:57:20 +0200 | commented answer | Using nauty_geng with variable number of vertices Thank you! This is very helpful! |
2014-02-12 13:39:09 +0200 | asked a question | Using nauty_geng with variable number of vertices I am trying to use the nauty graph generator to count the number of non-isomorphic graphs with specified properties, but I am hindered by the fact that it seems nauty_geng only allows a fixed number of vertices. For example, the following code counts the number of (non-isomorphic) connected graphs on 5 vertices: The Sage output is: 21. However, if I try to count the number of connected graphs on n vertices for n in a certain range, say n=3,4,5,6, as with the following code, ,the count remains equal to zero for each n, and the situation is the same for all similar codes I have tried. The result is that in order to see what happens for multiple values of n, I must manually change all occurrences of n in the code.
Thanks for any help with this! |