This is because the graph is relabelled before being send to plot. You must
give the new labels as values for the coloring dict.
sage: D = Poset(( divisors(12), attrcall("divides") ))
sage: mb={x:D.mobius_function(x, D.top()) for x in D}
sage: labels={x:(x, mb[x]) for x in D}
sage: v_colors={"red": [e for e in D if mb[e]>0], "gray": [e for e in D if
mb[e]==0], "blue": [e for e in D if mb[e]<0]}
sage: v_colors={"red": [labels[e] for e in D if mb[e]>0], "gray":
[labels[e] for e in D if mb[e]==0], "blue": [labels[e] for e in D if
mb[e]<0]}
sage: D.plot(element_labels=labels, vertex_colors=v_colors,
vertex_shape="s", vertex_size=2000, figsize=6)
Le jeudi 28 mai 2015 15:15:17 UTC+2, Jori Mäntysalo a écrit :
>
> After
>
> D = Poset(( divisors(12), attrcall("divides") ))
> mb={x:D.mobius_function(x, D.top()) for x in D}
> labels={x:(x, mb[x]) for x in D}
> v_colors={"red": [e for e in D if mb[e]>0], "gray": [e for e in D if
> mb[e]==0], "blue": [e for e in D if mb[e]<0]}
>
> it seems that
>
> D.plot(element_labels=labels)
> and
> D.plot(vertex_colors=v_colors, vertex_shape="s", vertex_size=2000,
> figsize=6)
>
> works, but
>
> D.plot(element_labels=labels, vertex_colors=v_colors, vertex_shape="s",
> vertex_size=2000, figsize=6)
>
> says
>
> Traceback (click to the left of this block for traceback)
> ...
> KeyError: 4
>
> Why so?
>
> --
> Jori Mäntysalo
>
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