***** To join INSNA, visit http://www.insna.org ***** <<<-------- aparna basu-------->>> > I searched for the keyword 'Magnesium' on the Amazon site and found more > than 50,000 titles, of which only 20 appear on the first page. I would > like to draw a network from this data and would appreciate some help from > anyone on this list who may have done this before. To draw a network you have first to define it. Assume that the 50,000 titles are vertices, what are the links? Some years ago I wrote a program in Python to get the network from Amazon based on "Customers who bought" ... http://vlado.fmf.uni-lj.si/vlado/podstat/AO/Amazon.zip http://vlado.fmf.uni-lj.si/pub/networks/data/econ/amazon/amazon.htm Since the program was interrupted several times I built in also the 'restart from' option. For small networks (some houndreds of vertices) I wrote, as an 'how to' illustration for students, a similar program in R. The structure of Amazon's pages changed - some adaptations in both programs are needed. See also http://mrvar.fdv.uni-lj.si/pub/mz/mz4.1/kejzar.pdf Vlado -- Vladimir Batagelj, University of Ljubljana, FMF, Department of Mathematics Jadranska 19, 1000 Ljubljana, Slovenia http://vlado.fmf.uni-lj.si _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.