qa_user — User interactions on Q&A websites (2016)

Description

Temporal networks of interactions among users of four question-and-answer websites of the Stack Exchange network: Stack Overflow (programming), Math Overflow (research mathematics), Super User (computer use) and Ask Ubuntu (the Ubuntu operating system). The networks were constructed by A. Paranjape, A. R. Benson and J. Leskovec from the public Stack Exchange data dump, and span from the creation of each site (2008 or 2009) until March 2016. Nodes are users, and a directed edge $(i,j)$ with timestamp $t$ indicates that user $i$ responded to a post of user $j$ at time $t$, in one of three ways:

a2q: user $i$ answered user $j$'s question;
c2q: user $i$ commented on user $j$'s question;
c2a: user $i$ commented on user $j$'s answer;

and all is the union of the three types. Each network is named after the site and the type of interaction, as in mathoverflow_a2q. Each interaction is a separate edge, so pairs of users can be connected by many parallel edges, and the networks contain self-loops, e.g. when users comment on their own posts.

The networks have the following properties:

vid: the user ID from the source data.
timestamp: the time of the interaction (Unix time, in seconds).

Tags

Social Online Unweighted Timestamps

Citation

A. Paranjape, A. R. Benson, & J. Leskovec, "Motifs in Temporal Networks". In Proceedings of the Tenth ACM International Conference on Web Search and Data Mining (WSDM ’17). Association for Computing Machinery, New York, NY, USA, 601–610. (2017) 10.1145/3018661.3018731 Sci-Hub

Upstream URL OK

https://snap.stanford.edu/data/sx-stackoverflow.html
https://snap.stanford.edu/data/sx-mathoverflow.html
https://snap.stanford.edu/data/sx-superuser.html
https://snap.stanford.edu/data/sx-askubuntu.html

Networks

Tip: click on a column header to sort the list, or hover over it for a description.

Column legend

$\left<k\right>$: Mean degree
$\sigma_k$: Standard deviation of the degrees
$\lambda_h$: Largest eigenvalue of the Hashimoto (non-backtracking) matrix
$\tau$: Random walk mixing time
$r$: Degree assortativity
$c$: Global clustering coefficient
$\oslash$: (Pseudo-) diameter
$S$: Relative size of the largest component
NPs: Node properties
EPs: Edge properties

Name	Nodes	Edges	$\left<k\right>$	$\sigma_k$	$\lambda_h$	$\tau$	$r$	$c$	$\oslash$	$S$	Kind	Mode	NPs	EPs	gt	GraphML	GML	csv
stackoverflow_all	2,601,977	63,497,050	24.40	436.50	713.99	47.91	0.25	0.04	11	0.99	Directed	Unipartite	vid	timestamp	361.8 MiB	469.2 MiB	457.8 MiB	476.3 MiB
stackoverflow_a2q	2,464,606	17,823,525	7.23	89.84	350.01	28.47	-0.03	0.01	13	0.98	Directed	Unipartite	vid	timestamp	123.5 MiB	153.2 MiB	151.2 MiB	167.1 MiB
stackoverflow_c2q	1,655,353	20,268,151	12.24	159.43	287.15	95.34	-0.05	0.00	12	0.98	Directed	Unipartite	vid	timestamp	113.7 MiB	143.9 MiB	140.6 MiB	152.4 MiB
stackoverflow_c2a	1,646,338	25,405,374	15.43	309.58	457.47	146.59	0.44	0.07	16	0.99	Directed	Unipartite	vid	timestamp	132.9 MiB	177.9 MiB	172.4 MiB	181.3 MiB
mathoverflow_all	24,818	506,550	20.41	232.49	195.43	21.78	0.22	0.23	9	0.99	Directed	Unipartite	vid	timestamp	2.8 MiB	4.0 MiB	3.9 MiB	3.8 MiB
mathoverflow_a2q	21,688	107,581	4.96	44.54	97.34	17.64	-0.01	0.10	10	0.98	Directed	Unipartite	vid	timestamp	910 KiB	1.3 MiB	1.3 MiB	1.2 MiB
mathoverflow_c2q	16,836	203,639	12.10	103.18	108.45	25.73	0.16	0.11	8	0.99	Directed	Unipartite	vid	timestamp	1.3 MiB	1.7 MiB	1.7 MiB	1.6 MiB
mathoverflow_c2a	13,840	195,330	14.11	154.24	124.97	25.31	0.38	0.26	9	0.98	Directed	Unipartite	vid	timestamp	1.1 MiB	1.6 MiB	1.6 MiB	1.4 MiB
superuser_all	194,085	1,443,339	7.44	152.37	202.37	78.00	0.07	0.03	12	0.97	Directed	Unipartite	vid	timestamp	10.2 MiB	14.8 MiB	14.5 MiB	14.2 MiB
superuser_a2q	167,981	430,033	2.56	30.92	97.67	181.22	-0.05	0.01	14	0.92	Directed	Unipartite	vid	timestamp	5.2 MiB	7.2 MiB	7.1 MiB	6.8 MiB
superuser_c2q	94,548	479,067	5.07	97.01	94.65	49.23	-0.06	0.00	13	0.96	Directed	Unipartite	vid	timestamp	3.9 MiB	5.4 MiB	5.3 MiB	5.2 MiB
superuser_c2a	101,052	534,239	5.29	102.53	131.69	102.81	0.40	0.07	13	0.94	Directed	Unipartite	vid	timestamp	4.3 MiB	6.1 MiB	5.9 MiB	5.7 MiB
askubuntu_all	159,316	964,437	6.05	119.11	151.60	73.09	0.15	0.04	13	0.96	Directed	Unipartite	vid	timestamp	7.3 MiB	10.5 MiB	10.3 MiB	9.9 MiB
askubuntu_a2q	137,517	280,102	2.04	25.51	75.70	60.15	-0.02	0.02	15	0.88	Directed	Unipartite	vid	timestamp	3.8 MiB	5.3 MiB	5.3 MiB	5.0 MiB
askubuntu_c2q	79,155	327,513	4.14	55.61	68.44	46.13	-0.11	0.01	13	0.94	Directed	Unipartite	vid	timestamp	2.8 MiB	3.9 MiB	3.9 MiB	3.7 MiB
askubuntu_c2a	75,555	356,822	4.72	88.34	99.08	66.60	0.38	0.07	13	0.93	Directed	Unipartite	vid	timestamp	2.9 MiB	4.1 MiB	4.1 MiB	3.8 MiB