fix: dtype conversion issue in detect_nonwear

function
OxWearables · Nov 29, 2023 · bc241af · bc241af
1 parent 341bfca
commit bc241af
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/actipy/processing.py b/src/actipy/processing.py
@@ -206,6 +206,10 @@ def detect_nonwear(data, patience='90m', window='10s', stdtol=15 / 1000):
         )
         .set_index('start_time')
         .squeeze()
+        # dtype defaults to int64 when series is empty, so
+        # astype('timedelta64[ns]') makes sure it's always a timedelta,
+        # otherwise comparison with Timedelta(patience) below will fail
+        .astype('timedelta64[ns]')
     )
     nonwear_segment_lengths = stationary_segment_lengths[stationary_segment_lengths > pd.Timedelta(patience)]