This plugin is a fork of the plugin developed by David F. Barrero. I have added some extra code in order to extract more detailed graph data. The code in this version is now fully functional but not very well structured

This plugin exports a graph which represents users friendship or group memberships as a GEFX file. This format can be imported by Gephi and other SNA packages in order to get a pretty visualization of the network and perform complex SNA.

SNA4Elgg provides the following features:

Export friendships and group memberships topologies to GEFX Nodes are users and groups Edges are users friendships or users memberships Interaction between users is modelled Dynamic graphs: Creation date is included in nodes and edges to support dynamic analysis. This feature can be used in Gephi to create cool animations A node type is added. It serves to distinguish between users and groups when exporting groups memberships In theory, it should support large networks. It has been tested with 2,000t users and works fine with max memory set to 64MB. Correct operation with 3,000 users and 200 groups has been reported. INSTALLATION NOTES

Just as usual: Uncompress the plugin in the mods directory and enable it in the administrative interface.

USAGE

Go to "Administration utilities -> SNA4Elgg", create the graph by pressing the "Update" button, and after that download it through the link "Download graph". Depending on the network size, generating the graph may take a long time since it involves intensive database access.

Import the GEXF file into Gephi Calculate statistics (for example Weighted Degree) Filter nodes based on n-type for example "member" Filter nodes based on calculated values