Update README.md

README.md

@@ -582,7 +582,15 @@ We recommend to use [bulk_download.py](bulk_download.py).
 
 ### Dataset post-processing and stats
 
-After bulk downloading, please use [validate_trajectories.py](validate_trajectories.py) and [calculate_stats.py](calculate_stats.py).
+After bulk downloading, please use
+- [validate_trajectories.py](validate_trajectories.py), to extract valid trajectories from each dataset and part, and
+- [calculate_stats.py](calculate_stats.py) to extract dataset stats, e.g. with `--key actions` as target.
+
+For example:
+```bash
+python validate_trajectories.py --index-only /path/to/DoorOpeningDataGenConfig/part0/train
+python hf_scripts/calculate_stats.py --aggregate-only /path/to/DoorOpeningDataGenConfig/part0/train --keys actions
+```
 
 ## License