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	<title>MovieLens 1M Details - Revision history</title>
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	<updated>2026-04-23T03:55:12Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://recsyswiki.com/index.php?title=MovieLens_1M_Details&amp;diff=1825&amp;oldid=prev</id>
		<title>Zeno Gantner: /* Academic Papers Using the MovieLens 1M Dataset */</title>
		<link rel="alternate" type="text/html" href="https://recsyswiki.com/index.php?title=MovieLens_1M_Details&amp;diff=1825&amp;oldid=prev"/>
		<updated>2013-03-19T11:22:56Z</updated>

		<summary type="html">&lt;p&gt;&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Academic Papers Using the MovieLens 1M Dataset&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #222; text-align: center;&quot;&gt;Revision as of 11:22, 19 March 2013&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot; &gt;Line 4:&lt;/td&gt;
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&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''This is a wiki. Please add more ...''&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;''This is a wiki. Please add more ...''&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[M. D. Ekstrand]], [[M. Ludwig]], [[J. A. Konstan]]: ''[http://www.grouplens.org/system/files/p133-ekstrand.pdf Rethinking the Recommender Research Ecosystem: Openness, Reproducibility, and LensKit]'', [[RecSys 2011]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[M. D. Ekstrand]], [[M. Ludwig]], [[J. A. Konstan]]: ''[http://www.grouplens.org/system/files/p133-ekstrand.pdf Rethinking the Recommender Research Ecosystem: Openness, Reproducibility, and LensKit]'', [[RecSys 2011]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;* [[Zeno Gantner]], [[Lucas Drumond]], [[Christoph Freudenthaler]], [[Steffen Rendle]], [[Lars Schmidt-Thieme]]: ''[http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.5933&amp;amp;rep=rep1&amp;amp;type=pdf Learning attribute-to-feature mappings for cold-start recommendations]'', [[ICDM 2010]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Detailed Statistics ==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Detailed Statistics ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>Zeno Gantner</name></author>
		
	</entry>
	<entry>
		<id>https://recsyswiki.com/index.php?title=MovieLens_1M_Details&amp;diff=1822&amp;oldid=prev</id>
		<title>Zeno Gantner: Created page with &quot;''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.''  == Acad...&quot;</title>
		<link rel="alternate" type="text/html" href="https://recsyswiki.com/index.php?title=MovieLens_1M_Details&amp;diff=1822&amp;oldid=prev"/>
		<updated>2013-03-19T11:14:18Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;#039;&amp;#039;This page contains specific details about the &amp;#039;&amp;#039;&amp;#039;MovieLens 1M dataset&amp;#039;&amp;#039;&amp;#039;. For more general information, please have a look at the &lt;a href=&quot;/wiki/MovieLens&quot; title=&quot;MovieLens&quot;&gt;MovieLens&lt;/a&gt; page in this wiki.&amp;#039;&amp;#039;  == Acad...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;''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.''&lt;br /&gt;
&lt;br /&gt;
== Academic Papers Using the MovieLens 1M Dataset ==&lt;br /&gt;
''This is a wiki. Please add more ...''&lt;br /&gt;
* [[M. D. Ekstrand]], [[M. Ludwig]], [[J. A. Konstan]]: ''[http://www.grouplens.org/system/files/p133-ekstrand.pdf Rethinking the Recommender Research Ecosystem: Openness, Reproducibility, and LensKit]'', [[RecSys 2011]]&lt;br /&gt;
&lt;br /&gt;
== Detailed Statistics ==&lt;br /&gt;
&amp;lt;code&amp;gt;[https://github.com/zenogantner/MyMediaLite/blob/master/scripts/statistics.pl scripts/statistics.pl] data/ml-1m/ratings.dat --separator=::&amp;lt;/code&amp;gt;&lt;br /&gt;
&amp;lt;pre&amp;gt;&lt;br /&gt;
1000209 unique events (user-item combinations) out of 1000209, 6040 users, 3706 items&lt;br /&gt;
sparsity: 95.5316 percent&lt;br /&gt;
first event: 2000-04-25 23:05:32, last event: 2003-02-28 17:49:50&lt;br /&gt;
Event levels and frequencies:&lt;br /&gt;
  1:	56174	(0.0562)&lt;br /&gt;
  2:	107557	(0.1075)&lt;br /&gt;
  3:	261197	(0.2611)&lt;br /&gt;
  4:	348971	(0.3489)&lt;br /&gt;
  5:	226310	(0.2263)&lt;br /&gt;
Event frequencies by month:&lt;br /&gt;
  2000-04:	11396&lt;br /&gt;
  2000-05:	67437&lt;br /&gt;
  2000-06:	54486&lt;br /&gt;
  2000-07:	90334&lt;br /&gt;
  2000-08:	182109&lt;br /&gt;
  2000-09:	52421&lt;br /&gt;
  2000-10:	42294&lt;br /&gt;
  2000-11:	290793&lt;br /&gt;
  2000-12:	113487&lt;br /&gt;
  2001-01:	18004&lt;br /&gt;
  2001-02:	8136&lt;br /&gt;
  2001-03:	6083&lt;br /&gt;
  2001-04:	5171&lt;br /&gt;
  2001-05:	4939&lt;br /&gt;
  2001-06:	4981&lt;br /&gt;
  2001-07:	4765&lt;br /&gt;
  2001-08:	4454&lt;br /&gt;
  2001-09:	3077&lt;br /&gt;
  2001-10:	2192&lt;br /&gt;
  2001-11:	2760&lt;br /&gt;
  2001-12:	3496&lt;br /&gt;
  2002-01:	3216&lt;br /&gt;
  2002-02:	2496&lt;br /&gt;
  2002-03:	2454&lt;br /&gt;
  2002-04:	2840&lt;br /&gt;
  2002-05:	1902&lt;br /&gt;
  2002-06:	1643&lt;br /&gt;
  2002-07:	1905&lt;br /&gt;
  2002-08:	2111&lt;br /&gt;
  2002-09:	1293&lt;br /&gt;
  2002-10:	1014&lt;br /&gt;
  2002-11:	1908&lt;br /&gt;
  2002-12:	1264&lt;br /&gt;
  2003-01:	1852&lt;br /&gt;
  2003-02:	1496&lt;br /&gt;
&amp;lt;/pre&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
[[Category: Dataset]]&lt;br /&gt;
[[Category: Movie recommendation]]&lt;/div&gt;</summary>
		<author><name>Zeno Gantner</name></author>
		
	</entry>
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