Github

This is the membership network of the software development hosting site GitHub. The network is bipartite and contains users and projects, with links denoting that a user is a member of a project.

Metadata

CodeGH
Internal namegithub
NameGithub
Data sourcehttps://github.com/blog/466-the-2009-github-contest
AvailabilityDataset is available for download
Consistency checkDataset passed all tests
Category
Authorship network
Node meaningUser, project
Edge meaningMembership
Network formatBipartite, undirected
Edge typeUnweighted, no multiple edges

Statistics

Size n =177,386
Left size n1 =56,519
Right size n2 =120,867
Volume m =440,237
Wedge count s =53,048,506
Claw count z =17,233,019,660
Cross count x =9,927,710,269,155
Square count q =50,894,505
4-Tour count T4 =620,327,470
Maximum degree dmax =3,675
Maximum left degree d1max =884
Maximum right degree d2max =3,675
Average degree d =4.963 60
Average left degree d1 =7.789 19
Average right degree d2 =3.642 33
Fill p =6.444 43 × 10−5
Size of LCC N =139,737
Diameter δ =22
50-Percentile effective diameter δ0.5 =4.860 62
90-Percentile effective diameter δ0.9 =6.516 22
Median distance δM =5
Mean distance δm =5.353 42
Gini coefficient G =0.744 516
Balanced inequality ratio P =0.199 248
Left balanced inequality ratio P1 =0.205 260
Right balanced inequality ratio P2 =0.231 457
Relative edge distribution entropy Her =0.873 618
Power law exponent γ =2.612 40
Tail power law exponent γt =1.951 00
Degree assortativity ρ =−0.035 776 7
Degree assortativity p-value pρ =0.000 00
Spectral norm α =120.273
Algebraic connectivity a =0.010 203 8
Spectral separation 1[A] / λ2[A]| =2.027 71
Controllability C =78,745

Plots

Degree distribution

Cumulative degree distribution

Lorenz curve

Spectral distribution of the adjacency matrix

Spectral distribution of the normalized adjacency matrix

Spectral distribution of the Laplacian

Spectral graph drawing based on the adjacency matrix

Spectral graph drawing based on the Laplacian

Spectral graph drawing based on the normalized adjacency matrix

Degree assortativity

Zipf plot

Hop distribution

Matrix decompositions plots

Downloads

References

[1] Jérôme Kunegis. KONECT – The Koblenz Network Collection. In Proc. Int. Conf. on World Wide Web Companion, pages 1343–1350, 2013. [ http ]
[2] Scott Chacon. The 2009 GitHub contest. https://github.com/blog/466-the-2009-github-contest, July 2009.