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raw/README

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+SUMMARY & USAGE LICENSE
+=============================================
+
+MovieLens data sets were collected by the GroupLens Research Project
+at the University of Minnesota.
+ 
+This data set consists of:
+	* 100,000 ratings (1-5) from 943 users on 1682 movies. 
+	* Each user has rated at least 20 movies. 
+        * Simple demographic info for the users (age, gender, occupation, zip)
+
+The data was collected through the MovieLens web site
+(movielens.umn.edu) during the seven-month period from September 19th, 
+1997 through April 22nd, 1998. This data has been cleaned up - users
+who had less than 20 ratings or did not have complete demographic
+information were removed from this data set. Detailed descriptions of
+the data file can be found at the end of this file.
+
+Neither the University of Minnesota nor any of the researchers
+involved can guarantee the correctness of the data, its suitability
+for any particular purpose, or the validity of results based on the
+use of the data set.  The data set may be used for any research
+purposes under the following conditions:
+
+     * The user may not state or imply any endorsement from the
+       University of Minnesota or the GroupLens Research Group.
+
+     * The user must acknowledge the use of the data set in
+       publications resulting from the use of the data set
+       (see below for citation information).
+
+     * The user may not redistribute the data without separate
+       permission.
+
+     * The user may not use this information for any commercial or
+       revenue-bearing purposes without first obtaining permission
+       from a faculty member of the GroupLens Research Project at the
+       University of Minnesota.
+
+If you have any further questions or comments, please contact GroupLens
+<grouplens-info@cs.umn.edu>. 
+
+CITATION
+==============================================
+
+To acknowledge use of the dataset in publications, please cite the 
+following paper:
+
+F. Maxwell Harper and Joseph A. Konstan. 2015. The MovieLens Datasets:
+History and Context. ACM Transactions on Interactive Intelligent
+Systems (TiiS) 5, 4, Article 19 (December 2015), 19 pages.
+DOI=http://dx.doi.org/10.1145/2827872
+
+
+ACKNOWLEDGEMENTS
+==============================================
+
+Thanks to Al Borchers for cleaning up this data and writing the
+accompanying scripts.
+
+PUBLISHED WORK THAT HAS USED THIS DATASET
+==============================================
+
+Herlocker, J., Konstan, J., Borchers, A., Riedl, J.. An Algorithmic
+Framework for Performing Collaborative Filtering. Proceedings of the
+1999 Conference on Research and Development in Information
+Retrieval. Aug. 1999.
+
+FURTHER INFORMATION ABOUT THE GROUPLENS RESEARCH PROJECT
+==============================================
+
+The GroupLens Research Project is a research group in the Department
+of Computer Science and Engineering at the University of Minnesota.
+Members of the GroupLens Research Project are involved in many
+research projects related to the fields of information filtering,
+collaborative filtering, and recommender systems. The project is lead
+by professors John Riedl and Joseph Konstan. The project began to
+explore automated collaborative filtering in 1992, but is most well
+known for its world wide trial of an automated collaborative filtering
+system for Usenet news in 1996.  The technology developed in the
+Usenet trial formed the base for the formation of Net Perceptions,
+Inc., which was founded by members of GroupLens Research. Since then
+the project has expanded its scope to research overall information
+filtering solutions, integrating in content-based methods as well as
+improving current collaborative filtering technology.
+
+Further information on the GroupLens Research project, including
+research publications, can be found at the following web site:
+        
+        http://www.grouplens.org/
+
+GroupLens Research currently operates a movie recommender based on
+collaborative filtering:
+
+        http://www.movielens.org/
+
+DETAILED DESCRIPTIONS OF DATA FILES
+==============================================
+
+Here are brief descriptions of the data.
+
+ml-data.tar.gz   -- Compressed tar file.  To rebuild the u data files do this:
+                gunzip ml-data.tar.gz
+                tar xvf ml-data.tar
+                mku.sh
+
+u.data     -- The full u data set, 100000 ratings by 943 users on 1682 items.
+              Each user has rated at least 20 movies.  Users and items are
+              numbered consecutively from 1.  The data is randomly
+              ordered. This is a tab separated list of 
+	         user id | item id | rating | timestamp. 
+              The time stamps are unix seconds since 1/1/1970 UTC   
+
+u.info     -- The number of users, items, and ratings in the u data set.
+
+u.item     -- Information about the items (movies); this is a tab separated
+              list of
+              movie id | movie title | release date | video release date |
+              IMDb URL | unknown | Action | Adventure | Animation |
+              Children's | Comedy | Crime | Documentary | Drama | Fantasy |
+              Film-Noir | Horror | Musical | Mystery | Romance | Sci-Fi |
+              Thriller | War | Western |
+              The last 19 fields are the genres, a 1 indicates the movie
+              is of that genre, a 0 indicates it is not; movies can be in
+              several genres at once.
+              The movie ids are the ones used in the u.data data set.
+
+u.genre    -- A list of the genres.
+
+u.user     -- Demographic information about the users; this is a tab
+              separated list of
+              user id | age | gender | occupation | zip code
+              The user ids are the ones used in the u.data data set.
+
+u.occupation -- A list of the occupations.
+
+u1.base    -- The data sets u1.base and u1.test through u5.base and u5.test
+u1.test       are 80%/20% splits of the u data into training and test data.
+u2.base       Each of u1, ..., u5 have disjoint test sets; this if for
+u2.test       5 fold cross validation (where you repeat your experiment
+u3.base       with each training and test set and average the results).
+u3.test       These data sets can be generated from u.data by mku.sh.
+u4.base
+u4.test
+u5.base
+u5.test
+
+ua.base    -- The data sets ua.base, ua.test, ub.base, and ub.test
+ua.test       split the u data into a training set and a test set with
+ub.base       exactly 10 ratings per user in the test set.  The sets
+ub.test       ua.test and ub.test are disjoint.  These data sets can
+              be generated from u.data by mku.sh.
+
+allbut.pl  -- The script that generates training and test sets where
+              all but n of a users ratings are in the training data.
+
+mku.sh     -- A shell script to generate all the u data sets from u.data.

raw/allbut.pl

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+#!/usr/local/bin/perl
+
+# get args
+if (@ARGV < 3) {
+	print STDERR "Usage: $0 base_name start stop max_test [ratings ...]\n";
+	exit 1;
+}
+$basename = shift;
+$start = shift;
+$stop = shift;
+$maxtest = shift;
+
+# open files
+open( TESTFILE, ">$basename.test" ) or die "Cannot open $basename.test for writing\n";
+open( BASEFILE, ">$basename.base" ) or die "Cannot open $basename.base for writing\n";
+
+# init variables
+$testcnt = 0;
+
+while (<>) {
+	($user) = split;
+	if (! defined $ratingcnt{$user}) {
+		$ratingcnt{$user} = 0;
+	}
+	++$ratingcnt{$user};
+	if (($testcnt < $maxtest || $maxtest <= 0)
+	&& $ratingcnt{$user} >= $start && $ratingcnt{$user} <= $stop) {
+		++$testcnt;
+		print TESTFILE;
+	}
+	else {
+		print BASEFILE;
+	}
+}

raw/mku.sh

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+#!/bin/sh
+
+trap `rm -f tmp.$$; exit 1` 1 2 15
+
+for i in 1 2 3 4 5
+do
+	head -`expr $i \* 20000` u.data | tail -20000 > tmp.$$
+	sort -t"	" -k 1,1n -k 2,2n tmp.$$ > u$i.test
+	head -`expr \( $i - 1 \) \* 20000` u.data > tmp.$$
+	tail -`expr \( 5 - $i \) \* 20000` u.data >> tmp.$$
+	sort -t"	" -k 1,1n -k 2,2n tmp.$$ > u$i.base
+done
+
+allbut.pl ua 1 10 100000 u.data
+sort -t"	" -k 1,1n -k 2,2n ua.base > tmp.$$
+mv tmp.$$ ua.base
+sort -t"	" -k 1,1n -k 2,2n ua.test > tmp.$$
+mv tmp.$$ ua.test
+
+allbut.pl ub 11 20 100000 u.data
+sort -t"	" -k 1,1n -k 2,2n ub.base > tmp.$$
+mv tmp.$$ ub.base
+sort -t"	" -k 1,1n -k 2,2n ub.test > tmp.$$
+mv tmp.$$ ub.test
+

raw/u.genre

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+unknown|0
+Action|1
+Adventure|2
+Animation|3
+Children's|4
+Comedy|5
+Crime|6
+Documentary|7
+Drama|8
+Fantasy|9
+Film-Noir|10
+Horror|11
+Musical|12
+Mystery|13
+Romance|14
+Sci-Fi|15
+Thriller|16
+War|17
+Western|18
+

raw/u.info

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+943 users
+1682 items
+100000 ratings

raw/u.occupation

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+administrator
+artist
+doctor
+educator
+engineer
+entertainment
+executive
+healthcare
+homemaker
+lawyer
+librarian
+marketing
+none
+other
+programmer
+retired
+salesman
+scientist
+student
+technician
+writer

raw/u.user

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