Return the GN digraph with n nodes.
The GN (growing network) graph is built by adding nodes one at a time with a link to one previously added node. The target node for the link is chosen with probability based on degree. The default attachment kernel is a linear function of degree.
The graph is always a (directed) tree.
Parameters : | n : int
kernel : function
create_using : graph, optional (default DiGraph)
seed : hashable object, optional
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References
[R213] | P. L. Krapivsky and S. Redner, Organization of Growing Random Networks, Phys. Rev. E, 63, 066123, 2001. |
Examples
>>> D=nx.gn_graph(10) # the GN graph
>>> G=D.to_undirected() # the undirected version
To specify an attachment kernel use the kernel keyword
>>> D=nx.gn_graph(10,kernel=lambda x:x**1.5) # A_k=k^1.5