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# How can I search and count all induced subgraphs in a directed graph with edge labels?

Hello all,

I can extract all induced subgraphs and count them in a graph. My question is how I can search and count all induced subgraphs in a labeled graph (a graph with edge labels)? In documentation of g.subgraph() and g.subgraph_search_count() is mentioned that these functions should work on labeled graphs as well. but it does not work. Here is an example:

sage: g=DiGraph()
sage: g.add_vertex(0)

sage: g.add_vertex(1)
sage: g.add_vertex(2)
sage: g.add_edge(0,1,label="a")
sage: g.add_edge(1,2,label="b")
sage: g.plot(color_by_label="true")
sage: g.plot(color_by_label=true)

sage: s=DiGraph()
sage: s.add_vertex(0)
sage: s.add_vertex(1)
sage: s.add_edge(0,1,label="a")
sage: s.plot(color_by_label=true)

sage: g.subgraph_search_count(s)
2


While it should return 1 not 2.

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## Comments

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( 2015-04-24 09:34:32 +0200 )edit

Thanks. it's done.

( 2015-04-27 11:05:13 +0200 )edit

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## Comments

Hello Nathann,

Thank you for your comments and follow up for creating a ticket. Apparently the text of the documentation is already changed. Just, how can I search induced subgraphs in labeled graphs? This is the main problem. Are there any method or suggestion which helps me to do that?

( 2015-04-27 11:06:53 +0200 )edit

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Asked: 2015-04-23 12:29:44 +0200

Seen: 774 times

Last updated: Apr 27 '15