Merge pull request soft-matter#758 from hz-xiaxz/fix-issue-757

fix issue soft-matter#757
nkeim · May 30, 2024 · 9eaf029 · 9eaf029
2 parents 3912782 + 30f4de7
commit 9eaf029
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/trackpy/motion.py b/trackpy/motion.py
@@ -239,7 +239,7 @@ def emsd(traj, mpp, fps, max_lagtime=100, detail=False, pos_columns=None):
     if not detail:
         return results.set_index('lagt')['msd']
     # correctly compute the effective number of independent measurements
-    results['N'] = msds['N'].sum(level=1)
+    results['N'] = msds['N'].groupby(level=1).sum()
     return results