***** To join INSNA, visit http://www.insna.org ***** Hi socnetters, Although there indeed are some truly excellent and well-established software tools for conducting hierarchical clustering of network data, I am still trying to implement it in my language of choice (php actually). However, even though I understand the principles of agglomerative vs divisive algorithms, as well as the varieties of single-link etc, I still can't get the thinking right on how to implement an algorithm that works similar to how it's done in Ucinet (i.e. particularly the resulting Part-table where each node is assigned a subgroup index at each cutoff-level). Are there any open-source hc algorithms available? Is the algorithm used in Ucinet open-source? I found some pseudocode at Soss' homepage (http://cgm.cs.mcgill.ca/~soss/cs644/projects/siourbas/sect5.html) and I have also had a look at the C source code that Cluster 3.0 utilizes, but I would need something in-between with regards to detail level (the latter C code seems to include a lot of auxilliary functions). Yours, Carl -- Dr Carl Nordlund carl.nordlund(at)hek.lu.se Human Ecology Division, Lund university www.hek.lu.se _____________________________________________________________________ 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.