Resolve "release v2.3.0"

Closes #440 (closed)

mlair/helpers/helpers.py

@@ -151,7 +151,10 @@ def relative_round(x: float, sig: int, ceil=False, floor=False) -> float:
 
 def get_order(x: float):
     """Get order of number (as power of 10)"""
-    return int(np.floor(np.log10(abs(x))))
+    if x == 0:
+        return -np.inf
+    else:
+        return int(np.floor(np.log10(abs(x))))
 
 
 def remove_items(obj: Union[List, Dict, Tuple], items: Any):