Stack Overflow
This is the bipartite Stack Overflow favorite network. Stack Overflow is the
main question and answer website of the Stack Exchange Network. The nodes
represent users and posts. An undirected, unweighted edge denotes that a user
has marked a post as a favorite.
Metadata
Statistics
Size  n =  641,876

Left size  n_{1} =  545,196

Right size  n_{2} =  96,680

Volume  m =  1,301,942

Wedge count  s =  205,586,615

Claw count  z =  168,997,476,966

Cross count  x =  188,183,075,262,776

Square count  q =  18,293,548

4Tour count  T_{4} =  971,310,588

Maximum degree  d_{max} =  6,119

Maximum left degree  d_{1max} =  4,917

Maximum right degree  d_{2max} =  6,119

Average degree  d =  4.056 68

Average left degree  d_{1} =  2.388 03

Average right degree  d_{2} =  13.466 5

Fill  p =  2.470 03 × 10^{−5}

Size of LCC  N =  605,159

Diameter  δ =  20

50Percentile effective diameter  δ_{0.5} =  5.257 96

90Percentile effective diameter  δ_{0.9} =  6.423 08

Median distance  δ_{M} =  6

Mean distance  δ_{m} =  5.576 15

Gini coefficient  G =  0.705 753

Balanced inequality ratio  P =  0.214 349

Left balanced inequality ratio  P_{1} =  0.309 018

Right balanced inequality ratio  P_{2} =  0.196 541

Relative edge distribution entropy  H_{er} =  0.890 745

Tail power law exponent  γ_{t} =  2.011 00

Tail power law exponent with p  γ_{3} =  2.011 00

pvalue  p =  0.000 00

Left tail power law exponent with p  γ_{3,1} =  2.451 00

Left pvalue  p_{1} =  0.651 000

Right tail power law exponent with p  γ_{3,2} =  2.611 00

Right pvalue  p_{2} =  0.000 00

Degree assortativity  ρ =  −0.039 986 1

Degree assortativity pvalue  p_{ρ} =  0.000 00

Spectral norm  α =  99.977 2

Algebraic connectivity  a =  0.013 941 0

Controllability  C =  460,863

Relative controllability  C_{r} =  0.717 997

Plots
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]

Stack Exchange Inc.
Stack exchange data explorer.
http://data.stackexchange.com/, 2011.
