This dataset contains social networking, tagging, and music artist listening information from a set of 2K users from Last.fm online music system. The dataset is released in the framework of the 2nd International Workshop on Information Heterogeneity and Fusion in Recommender Systems (HetRec 2011)
Data statistics
1892 users 17632 artists
12717 bi-directional user friend relations, i.e. 25434 (user_i, user_j) pairs avg. 13.443 friend relations per user
92834 user-listened artist relations, i.e. tuples [user, artist, listeningCount] avg. 49.067 artists most listened by each user avg. 5.265 users who listened each artist
11946 tags
186479 tag assignments (tas), i.e. tuples [user, tag, artist] avg. 98.562 tas per user avg. 14.891 tas per artist avg. 18.930 distinct tags used by each user avg. 8.764 distinct tags used for each artist
Files
-
artists.dat
This file contains information about music artists listened and tagged by the users.
-
tags.dat
This file contains the set of tags available in the dataset.
-
user_artists.dat
This file contains the artists listened by each user.
It also provides a listening count for each [user, artist] pair.
-
user_taggedartists.dat - user_taggedartists-timestamps.dat
These files contain the tag assignments of artists provided by each particular user.
They also contain the timestamps when the tag assignments were done.
-
user_friends.dat
These files contain the friend relations between users in the database.
Data format
The data is formatted one entry per line as follows (tab separated, "\t"):
-
artists.dat
id \t name \t url \t pictureURL
Example: 707 Metallica http://www.last.fm/music/Metallica http://userserve-ak.last.fm/serve/252/7560709.jpg
-
tags.dat
tagID \t tagValue 1 metal
-
user_artists.dat
userID \t artistID \t weight 2 51 13883
-
user_taggedartists.dat
userID \t artistID \t tagID \t day \t month \t year 2 52 13 1 4 2009
-
user_taggedartists-timestamps.dat
userID \t artistID \t tagID \t timestamp 2 52 13 1238536800000
-
user_friends.dat
userID \t friendID 2 275
