adrian wrote:
> The following works nice:
> G=Graph({0:[1,2],1:[2,3],2:[4]})
> G.show()
>
> But the following produces a wrong drawing
> H=DiGraph({0:[1,2],1:[2,3],2:[4]})
> H.show()
Yes, there was a simple, but serious bug in the arrow-drawing code in
3.1.1. That was the first fix to go into 3.1.2, which should be out in
a matter of days.
>
> However, H.show3d() works fine
>
> Now, there is another problem:
>
> Say, I want to define a multigraph with selfloops, and edge labels..
> One way to do this is:
>
> import networkx
> G=networkx.XDiGraph(selfloops=True,multiedges=True)
> for i in range(3): G.add_node(i)
> for i in [(1,1,'hola'),(1,1,'hi'),(1,2,'two'),(1,2,'dos'),
> (2,1,'one')]: G.add_edge(i)
> G=DiGraph(G)
>
> Now, I would be tempted to just do the following:
> G=DiGraph({1:{1:'hola',1:'hi',2:'two',2:'dos'},2:{1:'one'}},
> loops=True, multiedges=True)
>
> or trying
>
> import networkx
> G=networkx.XDiGraph({1:{1:'hola',1:'hi',2:'two',2:'dos'},2:{1:'one'}},
> selfloops=True, multiedges=True)
>
> But in each case I get:
>
> G.edges()
>
> (1, 1, 'h'), (1, 1, 'i'), (1, 2, 'd'), (1, 2, 'o'), (1, 2, 's'), (2,
> 1,
> 'o'), (2, 1, 'n'), (2, 1, 'e')]
>
>
> Which is not as intended for two reasons: One is that the labels are
> wrong, and the other one is that it created three edges from 1 to 2.
>
> Any help?
It looks like it is creating an edge for every character in every other
label, which I think is a bug. I've created a ticket to track the
status of this bug: http://trac.sagemath.org/sage_trac/ticket/3928
Thanks for reporting it.
Jason
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