Table 1 Overview of data set characteristics.

From: Active learning algorithm for alleviating the user cold start problem of recommender systems

 

MovieLens 1M

Publiq

rating scale

1-5

1 (unary)

rating density (%)

4.4684

0.0098

# ratings

1,000,208

615,777

# min ratings/user

20

1

# avg ratings/user

166

1.36

# max ratings/user

2314

488

# users

6,040

452,395

# items

3,706

13,826

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