***** To join INSNA, visit http://www.insna.org ***** Several years ago I experimented with spring-embedding algorithms and wrote a couple of java applet. I have also written a C# (Windows) client program to visualize the social network of the people attending my PhD graduation party, but that one was just an ordinary 2d-open type without calculating Kruskal stress indices. I did an applet prototype that allows data to be displayed in a variety of spring-embedding ways - open 2d, open 3d, closed 2d (i.e. on the surface of a sphere) - and they work well for dense, weighted networks with many nodes. Also, the spring-embedders calculate Kruskal stress indices - although spring-embedders generally doesn't arrive at the optimum minimum for stress, you can tweak the parameters to minimize this value. At that time, I primarily worked with international trade flow data which are also typically very dense and have huge value spans. The program is located here: http://demesta.com/sph_dev/test2/ If you could send me your data, preferably in a syntax like this: http://www.demesta.com/sph_dev/test2/data/migflows.txt ...I can install it on the server so you can experiment with the applet to see whether it yields any good output. Or a simple csv-textfile should also work - I can then convert into my format. Yours, Carl Dr Carl Nordlund carl.nordlund(at)hek.lu.se Human Ecology Division, Lund university www.hek.lu.se ________________________________ Från: Social Networks Discussion Forum [[log in to unmask]] för Andrei Boutyline [[log in to unmask]] Skickat: den 17 maj 2011 05:49 Till: [log in to unmask] Ämne: [SOCNET] Plotting weighted networks in R or Python? ***** To join INSNA, visit http://www.insna.org ***** Dear all, I'm hoping somebody can point me to a good tool for laying out and plotting weighted networks. In my data, every node is connect to every other node, albeit with different tie strengths. So, a layout algorithm that doesn't take weights into account will just give me a ball of nodes. Is there a library for R or Python that can produce a more meaningful layout from such data? Or, in the absence of a library, is there a standalone program? (By the way, the total number of nodes in my network under 150.) Thanks a lot! Andrei -- Andrei Boutyline University of California, Berkeley PhD Student, Sociology www.ocf.berkeley.edu/~andrei<http://www.ocf.berkeley.edu/%7Eandrei> _____________________________________________________________________ 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. _____________________________________________________________________ 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.