VertexAdd seems to forget EdgeWeight values
- To: mathgroup at smc.vnet.net
- Subject: [mg119478] VertexAdd seems to forget EdgeWeight values
- From: Julian Francis <julian.w.francis at gmail.com>
- Date: Sun, 5 Jun 2011 07:05:12 -0400 (EDT)
Dear all,
It seems that when you add a vertex to a graph with EdgeWeight's, that
the old edge weights are not carried over to the new graph. Is this a
bug?
In[561]:=
graph1 = Graph[{1, 2}, {1 \[DirectedEdge] 2}, EdgeWeight -> {5}];
In[557]:= PropertyValue[{graph1, 1 \[DirectedEdge] 2}, EdgeWeight]
Out[557]= 5
In[562]:= graph2 = VertexAdd[graph1, 6];
In[560]:= PropertyValue[{graph2, 1 \[DirectedEdge] 2}, EdgeWeight]
Out[560]= $Failed
Thanks,
Julian.