Ask Ubuntu

These are interactions from the StackExchange site "Ask Ubuntu". The network is between users, and directed edges represent three types of interactions: answering a question of another user, commenting on another user's question, and commenting on another user's answer. The network is temporal. This network is part of a series of network from multiple StackExchange sites.


Internal namesx-askubuntu
NameAsk Ubuntu
Data source
AvailabilityDataset is available for download
Consistency checkDataset passed all tests
Online contact network
Node meaningUser
Edge meaningAnswer/comment
Network formatUnipartite, directed
Edge typeUnweighted, multiple edges
Temporal data Edges are annotated with timestamps
ReciprocalContains reciprocal edges
Directed cyclesContains directed cycles
LoopsContains loops
Snapshot Is a snapshot and likely to not contain all data


Size n =159,316
Volume m =964,437
Unique edge count m̿ =596,933
Loop count l =237,776
Wedge count s =188,156,256
Claw count z =252,705,958,594
Cross count x =249,885,857,271,550
Triangle count t =680,407
Square count q =71,698,775
4-Tour count T4 =1,327,126,606
Maximum degree dmax =12,316
Maximum outdegree d+max =8,729
Maximum indegree dmax =4,926
Average degree d =12.107 2
Fill p =2.351 83 × 10−5
Average edge multiplicity m̃ =1.615 65
Size of LCC N =152,599
Size of LSCC Ns =59,813
Relative size of LSCC Nrs =0.375 436
Diameter δ =13
50-Percentile effective diameter δ0.5 =3.278 48
90-Percentile effective diameter δ0.9 =4.482 80
Median distance δM =4
Mean distance δm =3.819 30
Gini coefficient G =0.776 547
Balanced inequality ratio P =0.194 306
Outdegree balanced inequality ratio P+ =0.179 595
Indegree balanced inequality ratio P =0.232 914
Relative edge distribution entropy Her =0.857 714
Power law exponent γ =2.113 18
Tail power law exponent γt =2.141 00
Degree assortativity ρ =−0.155 792
Degree assortativity p-value pρ =0.000 00
In/outdegree correlation ρ± =+0.654 317
Clustering coefficient c =0.010 848 5
Directed clustering coefficient c± =0.013 786 8
Spectral norm α =3,277.17
Operator 2-norm ν =1,643.72
Cyclic eigenvalue π =1,626.33
Algebraic connectivity a =0.043 786 1
Reciprocity y =0.385 591
Non-bipartivity bA =0.992 928
Normalized non-bipartivity bN =0.027 748 7
Spectral bipartite frustration bK =0.001 856 31


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

In/outdegree scatter plot

Edge weight/multiplicity distribution

Clustering coefficient distribution

Average neighbor degree distribution

Temporal distribution

Diameter/density evolution


Matrix decompositions plots



[1] Jérôme Kunegis. KONECT – The Koblenz Network Collection. In Proc. Int. Conf. on World Wide Web Companion, pages 1343–1350, 2013. [ http ]
[2] Jure Leskovec. Stanford Network Analysis Project., September 2014.