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 | 1 | initial version |
Hi,
The GraphQuery command is about consulting the database of small graphs. If you want to actually build the list from scratch use:
sage: from itertools import ifilter
sage: f = lambda g: g.is_connected() and not g.is_long_hole_free()
sage: for g in ifilter(f, graphs(6)):
....: print g
Graph on 6 vertices
Graph on 6 vertices
....
Graph on 6 vertices
If you want to create the list and not just iterate through them you can use
sage: L = filter(f, graphs(6))
sage: graphs_list.show_graphs(L)
Note that the same method would work with a graph query as well.
Vincent
| | 2 | No.2 Revision |
Hi,
The GraphQuery command is about consulting the database of small graphs. If you want to actually build the list from scratch use:
sage: from itertools import ifilter
sage: f = lambda g: g.is_connected() and not g.is_long_hole_free()
sage: for g in ifilter(f, graphs(6)):
....: print g
Graph on 6 vertices
Graph on 6 vertices
....
Graph on 6 vertices
If you want to create the list and not just iterate through them you can use
sage: L = filter(f, graphs(6))
sage: graphs_list.show_graphs(L)
Note that the same method would work with a graph query as well.well. But whatever you chose it will take forever with 9 vertices.
Vincent
