Research Article
Reliable Collaborative Filtering on Spatio-Temporal Privacy Data
Table 2
Example of check-in data of Foursquare dataset.
| | User ID | Check-in time | Altitude | Longitude | Location ID |
| | 0 | 2011-01-01 | 41.727575 | | 0 | | 1 | 2011-01-01 | 51.31791 | | 1 | | 2 | 2011-01-01 | 33.767021 | | 2 | | 3 | 2011-01-01 | 40.774759 | | 3 | | 4 | 2011-01-01 | 40.77476 | | 4 | | 5 | 2011-01-01 | 26.93896 | | 5 |
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