Fix for bug in rank norm reported by Cameron Ellis

rivetTDA · Apr 12, 2018 · 0153ef9 · 0153ef9
1 parent 092085e
commit 0153ef9
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/atlatl/rank.py b/atlatl/rank.py
@@ -109,6 +109,8 @@ def barcode_rank(barcode, birth, death):
     """Return the number of bars that are born by 
     `birth` and die after `death`."""
     arr = barcode.to_array()
+    if arr.shape[0] == 0:
+        return 0
     included = np.logical_and(arr[:, 0] <= birth, arr[:, 1] > death)
     return np.sum(arr[included, 2])