fix: incorrect arguments to np.pad

Author: william-silversmith

kimimaro/utility.py

@@ -194,12 +194,12 @@ def moving_average(a:np.ndarray, n:int) -> np.ndarray:
     raise ValueError(f"Window size ({n}), must be >= 1.")
   elif n == 1:
     return a
-  mirror = (len(a) - (len(a) - n + 1)) / 2
+  mirror = (n - 1) / 2
   extra = 0
   if mirror != int(mirror):
     extra = 1
   mirror = int(mirror)
-  a = np.pad(a, [[mirror+extra, extra],[0,0]], mode="symmetric")
+  a = np.pad(a, [[mirror, mirror+extra],[0,0]], mode="symmetric")
   ret = np.cumsum(a, dtype=float, axis=0)
   ret[n:] = ret[n:] - ret[:-n]
   return ret[n - 1:] / n