Description: Email network from a EU research institution
|(bipartite graph drawing)||(graph drawing of A+A')|
|number of rows||265,214|
|number of columns||265,214|
|# strongly connected comp.||231,000|
|explicit zero entries||0|
|nonzero pattern symmetry||26%|
|numeric value symmetry||26%|
|author||J. Leskovec, J. Kleinberg and C. Faloutsos|
Networks from SNAP (Stanford Network Analysis Platform) Network Data Sets, Jure Leskovec http://snap.stanford.edu/data/index.html email jure at cs.stanford.edu EU email communication network Dataset information The network was generated using email data from a large European research institution. For a period from October 2003 to May 2005 (18 months) we have anonymized information about all incoming and outgoing email of the research institution. For each sent or received email message we know the time, the sender and the recipient of the email. Overall we have 3,038,531 emails between 287,755 different email addresses. Note that we have a complete email graph for only 1,258 email addresses that come from the research institution. Furthermore, there are 34,203 email addresses that both sent and received email within the span of our dataset. All other email addresses are either non-existing, mistyped or spam. Given a set of email messages, each node corresponds to an email address. We create a directed edge between nodes i and j, if i sent at least one message to j. Dataset statistics Nodes 265214 Edges 420045 Nodes in largest WCC 224832 (0.848) Edges in largest WCC 395270 (0.941) Nodes in largest SCC 34203 (0.129) Edges in largest SCC 151930 (0.362) Average clustering coefficient 0.3093 Number of triangles 267313 Fraction of closed triangles 0.004106 Diameter (longest shortest path) 13 90-percentile effective diameter 4.5 Source (citation) J. Leskovec, J. Kleinberg and C. Faloutsos. Graph Evolution: Densification and Shrinking Diameters. ACM Transactions on Knowledge Discovery from Data (ACM TKDD), 1(1), 2007. Files File Description email-EuAll.txt.gz Email network of a large European Research Institution
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Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.