| fill_run | Fill NA with previous non-NA element |
| lag_run | Lag dependent on variable |
| length_run | Length of running windows |
| max_run | Running minimum |
| mean_run | Running mean |
| min_run | Running minimum |
| streak_run | Running streak length |
| sum_run | Running sum |
| unique_run | List of running windows |
| whichd_run | Index of previous, different element |
| whicht_run | Running which-true function |
| window_run | List of running windows |