I am learning a bit of Mathematica from the book of Paul Wellin Prog with Math. In Chapter 5 he makes a nice example of a VertexGraphand he uses imported proteine strings data from a Wolfram Server. I had the idea to use this for a similar experiment with my Facebook friends. I made a data sheet in Excel and imported it in Mathematica. After some cleaning up I had seemingly the same format as Wellin. But trying to graph the data resulted in an error message Graph::supp: Mixed graphs and multigraphs are not supported. ?
When I made a simple example with some tekst (without quotes) by hand the it works fine ? What could be the problem ? I have a suspicion that the imported data has somewhere quotes left.
Thank you fo your time Chiel Geeraert
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