question on constructing graphs

• To: mathgroup at smc.vnet.net
• Subject: [mg101609] question on constructing graphs
• From: Randi Griffin <rgriff23 at gmail.com>
• Date: Fri, 10 Jul 2009 23:24:54 -0400 (EDT)

```Is it possible to construct weighted directed graphs with multiple edges from an asymmetric adjacency matrix in Mathematica? From the Wolfram documentation center:

uses v as the embedding for the resulting graph. The option Type can be used along with the EdgeWeight tag.

But when I try to do this, nothing happens:

In[334]:=

g = FromAdjacencyMatrix[{{Infinity, 1, 3, 4, 2, 2} {3, Infinity, 3, 2,
5, 1}, {4, 7, Infinity, 6, 2, 1}, {5, 1, 2, Infinity, 5,
Infinity}, {2, 1, 2, 4, Infinity, 1}, {1, 2, 1, 1, 2, Infinity}},
CircularEmbedding, EdgeWeight, Type -> Directed]

Out[334]=

FromAdjacencyMatrix[{{\[Infinity], \[Infinity], 9, 8, 10, 2}, {4,
7, \[Infinity], 6, 2, 1}, {5, 1, 2, \[Infinity],
5, \[Infinity]}, {2, 1, 2, 4, \[Infinity], 1}, {1, 2, 1, 1,
2, \[Infinity]}}, CircularEmbedding, EdgeWeight, Type -> Directed]

The numbers are all different in the output matrix, but I don't know what is going on. I have been working with the program for about 2 months now, so still pretty new to this.

```

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