***** To join INSNA, visit http://www.insna.org ***** <<<-------- Thomas Plotkowiak-------->>> > ***** To join INSNA, visit http://www.insna.org ***** > > Dear Members, > > Are there any guidelines on how to "trim down" networks when one has > weighted edges? I use to throw out edges below a certain threshold > (e.g. users exchanging less than 1 tweet a month or so). The resulting > network gives much better network measures (e.g. betweeness) removing > all these "clutter" edges from it. Has this procedure been used in > some recent SNA papers ? The only similar filtering application I > found in Tsvetovat's book on social network analysis where he calls > this procedure the "island method". (p 62) I call this approach line/vertex cut depending on line/vertex property used. See pages 8251-8252 in Batagelj, V.: Social Network Analysis, Large-Scale. R.A. Meyers, ed., Encyclopedia of Complexity and Systems Science, Springer 2009: 8245-8265. http://www.springerlink.com/content/tp3w7237m4624462/ http://vlado.fmf.uni-lj.si/pub/networks/doc/mix/largeSNA.pdf They are available in Pajek almost from its beginning. In 2003 we enhanced the cuts approach with the islands approach - see pages 8254-8256 or in more details on slides http://vlado.fmf.uni-lj.si/pub/networks/doc/sunbelt/islands.pdf http://vlado.fmf.uni-lj.si/pub/networks/doc/mix/islandsUK.pdf Also islands approach is available in Pajek (from 2004). 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.