Description Usage Format Source References Examples
The 100k MovieLense
ratings data set. 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.
The data set contains about 100,000 ratings (1-5)
from 943 users on 1664 movies. Movie metadata is also provided in MovieLenseMeta
.
1 |
The format of MovieLense
is an object of class "realRatingMatrix"
The format of MovieLenseMeta
is a data.frame with movie title, year, IMDb URL and indicator variables for 19 genres.
GroupLens Research, http://www.grouplens.org/node/73
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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | data(MovieLense)
MovieLense
## look at the first few ratings of the first user
head(as(MovieLense[1,], "list")[[1]])
## visualize part of the matrix
image(MovieLense[1:100,1:100])
## number of ratings per user
hist(rowCounts(MovieLense))
## number of ratings per movie
hist(colCounts(MovieLense))
## mean rating (averaged over users)
mean(rowMeans(MovieLense))
## available movie meta information
head(MovieLenseMeta)
|
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