The data set contains a 4-week crawl (August / September 2004) from the Book-Crossing community. Contains 278,858 users (anonymized) providing 1,149,780 ratings (explicit / implicit) about 271,379 books.
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The format is:
BX: Formal class 'realRatingMatrix' [package "recommenderlab"] BXBooks: data.frame with book meta information (title, author, year, publisher)
44778 x 204680 rating matrix of class 'realRatingMatrix' with 493813 ratings between 0 and 10.
Cai-Nicolas Ziegler, Sean M. McNee, Joseph A. Konstan, Georg Lausen, "Improving Recommendation Lists Through Topic Diversification," Proceedings of the 14th International World Wide Web Conference (WWW '05), May 10-14, 2005, Chiba, Japan.
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Loading required package: recommenderlab Loading required package: Matrix Loading required package: arules Attaching package: 'arules' The following objects are masked from 'package:base': abbreviate, write Loading required package: proxy Attaching package: 'proxy' The following object is masked from 'package:Matrix': as.matrix The following objects are masked from 'package:stats': as.dist, dist The following object is masked from 'package:base': as.matrix Loading required package: registry 105283 x 340547 rating matrix of class 'realRatingMatrix' with 1149778 ratings.
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