Bugfix.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>

gms_preprocessing/algorithms/classification.py

@@ -510,7 +510,7 @@ def calc_sam(s1_norm, s2_norm, axis=0):
     upper = np.sum(s1_norm * s2_norm, axis=axis)
     lower = np.sqrt(np.sum(s1_norm * s1_norm, axis=axis)) * np.sqrt(np.sum(s2_norm * s2_norm, axis=axis))
 
-    if lower.ndim > 1:
+    if isinstance(lower, np.ndarray):
         lower[lower == 0] = 1e-10
     else:
         lower = lower or 1e-10