## SNAP/com-LiveJournal

SNAP network: LiveJournal social network and ground-truth communities

Name | com-LiveJournal |
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Group | SNAP |

Matrix ID | 2781 |

Num Rows | 3,997,962 |

Num Cols | 3,997,962 |

Nonzeros | 69,362,378 |

Pattern Entries | 69,362,378 |

Kind | Undirected Graph With Communities |

Symmetric | Yes |

Date | 2012 |

Author | J. Yang, J. Leskovec |

Editor | J. Leskovec |

Download | MATLAB Rutherford Boeing Matrix Market |
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Notes |
SNAP (Stanford Network Analysis Platform) Large Network Dataset Collection, Jure Leskovec and Anrej Krevl, http://snap.stanford.edu/data, June 2014. email: jure at cs.stanford.edu LiveJournal social network and ground-truth communities https://snap.stanford.edu/data/com-LiveJournal.html Dataset information LiveJournal (http://www.livejournal.com/) is a free on-line blogging community where users declare friendship each other. LiveJournal also allows users form a group which other members can then join. We consider such user-defined groups as ground-truth communities. We provide the LiveJournal friendship social network and ground-truth communities. We regard each connected component in a group as a separate ground-truth community. We remove the ground-truth communities which have less than 3 nodes. We also provide the top 5,000 communities with highest quality which are described in our paper (http://arxiv.org/abs/1205.6233). As for the network, we provide the largest connected component. Dataset statistics Nodes 3,997,962 Edges 34,681,189 Nodes in largest WCC 3997962 (1.000) Edges in largest WCC 34681189 (1.000) Nodes in largest SCC 3997962 (1.000) Edges in largest SCC 34681189 (1.000) Average clustering coefficient 0.2843 Number of triangles 177820130 Fraction of closed triangles 0.04559 Diameter (longest shortest path) 17 90-percentile effective diameter 6.5 Source (citation) J. Yang and J. Leskovec. Defining and Evaluating Network Communities based on Ground-truth. ICDM, 2012. http://arxiv.org/abs/1205.6233 Files File Description com-lj.ungraph.txt.gz Undirected LiveJournal network com-lj.all.cmty.txt.gz LiveJournal communities com-lj.top5000.cmty.txt.gz LiveJournal communities (Top 5,000) --------------------------------------------------------------------------- Notes on inclusion into the SuiteSparse Matrix Collection, July 2018: --------------------------------------------------------------------------- The graph in the SNAP data set is 0-based, with nodes numbering 0 to 4,036,537. In the SuiteSparse Matrix Collection, Problem.A is the undirected LiveJournal network, a matrix of size n-by-n with n=3,997,962, which is the number of unique user id's appearing in any edge. Problem.aux.nodeid is a list of the node id's that appear in the SNAP data set. A(i,j)=1 if person nodeid(i) is friends with person nodeid(j). The node id's are the same as the SNAP data set (0-based). C = Problem.aux.Communities_all is a sparse matrix of size n by 664,414 which represents the communities in the com-lj.all.cmty.txt file. The kth line in that file defines the kth community, and is the column C(:,k), where C(i,k)=1 if person nodeid(i) is in the kth community. Row C(i,:) and row/column i of the A matrix thus refer to the same person, nodeid(i). Ctop = Problem.aux.Communities_top5000 is n-by-5000, with the same structure as the C array above, with the content of the com-lj.top5000.cmty.txt file. |