Variable | Definition |
---|---|
a | The number of places in the data (e.g. the number of stations in the smart card data of public transportation) |
b | The number of days in the data |
m | \(a \times b\) |
n | The number of time-slices in 1 day. For example, if the length of one time-slice is 1 hour, \(n=24\). If the length of one time-slice is 30 minutes, \(n=48\) |
\({\mathbf {V}}\) | A matrix that has information about the number of visitors for each day, each place, and time-slice. Each row indicates a specific day and place. Each column indicates a specific time-slice |
\({\mathbf {W}}\) | A matrix that has information about the inferred number of visitors for each place and each day by activity type. Each row indicates a specific day and station. Each column indicates a specific activity type |
\({\mathbf {H}}\) | A matrix that has information about time-series distribution of visitors for each activity type. Each row indicates a specific activity type. Each column indicates a specific time-slice |