MovieLens 1M Details

This page contains specific details about the MovieLens 1M dataset. For more general information, please have a look at the MovieLens page in this wiki.

Academic Papers Using the MovieLens 1M Dataset

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• M. D. Ekstrand, M. Ludwig, J. A. Konstan: Rethinking the Recommender Research Ecosystem: Openness, Reproducibility, and LensKit, RecSys 2011
• Zeno Gantner, Lucas Drumond, Christoph Freudenthaler, Steffen Rendle, Lars Schmidt-Thieme: Learning attribute-to-feature mappings for cold-start recommendations, ICDM 2010

Detailed Statistics

scripts/statistics.pl data/ml-1m/ratings.dat --separator=::

1000209 unique events (user-item combinations) out of 1000209, 6040 users, 3706 items
sparsity: 95.5316 percent
first event: 2000-04-25 23:05:32, last event: 2003-02-28 17:49:50
Event levels and frequencies:
  1:	56174	(0.0562)
  2:	107557	(0.1075)
  3:	261197	(0.2611)
  4:	348971	(0.3489)
  5:	226310	(0.2263)
Event frequencies by month:
  2000-04:	11396
  2000-05:	67437
  2000-06:	54486
  2000-07:	90334
  2000-08:	182109
  2000-09:	52421
  2000-10:	42294
  2000-11:	290793
  2000-12:	113487
  2001-01:	18004
  2001-02:	8136
  2001-03:	6083
  2001-04:	5171
  2001-05:	4939
  2001-06:	4981
  2001-07:	4765
  2001-08:	4454
  2001-09:	3077
  2001-10:	2192
  2001-11:	2760
  2001-12:	3496
  2002-01:	3216
  2002-02:	2496
  2002-03:	2454
  2002-04:	2840
  2002-05:	1902
  2002-06:	1643
  2002-07:	1905
  2002-08:	2111
  2002-09:	1293
  2002-10:	1014
  2002-11:	1908
  2002-12:	1264
  2003-01:	1852
  2003-02:	1496