Research Article
Detection of Abnormal Item Based on Time Intervals for Recommender Systems
Table 3
Monthly rating distributions.
| | th month | Number
of rating 1 | Number
of rating 2 | Number
of rating 3 | Number
of rating 4 | Number
of rating 5 | |
| | 1 | 0 | 0 | 8 | 3 | 2 | 6.4189 | | 2 | 0 | 6 | 9 | 14 | 20 | 19.501 | | 3 | 1 | 3 | 6 | 6 | 5 | 0.7521 | | 4 | 2 | 2 | 9 | 11 | 1 | 7.8567 | | 5 | 0 | 1 | 4 | 8 | 0 | 7.5359 | | 6 | 1 | 2 | 3 | 1 | 2 | 4.3157 | | 7 | 1 | 1 | 8 | 4 | 2 | 3.4811 |
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