add __len__ to smrt_diag and solve a typo due to the last merge

smrt/core/lib.py

@@ -71,6 +71,7 @@ class smrt_diag(object):
     __array_ufunc__ = None
 
     def __init__(self, arr):
+        self.diag = np.atleast_1d(arr)
 
     def diagonal(self):
         return self.diag
@@ -79,6 +80,9 @@ def diagonal(self):
     # def shape(self):
     #     return self.values.shape
 
+    def __len__(self):
+        return len(self.diag)
+
     def __rmatmul__(self, other):
         self.check_type(other)
         return other * self.diag[np.newaxis, :]

smrt/rtsolver/dort.py

@@ -885,7 +885,7 @@ def combine_coherent_diffuse_matrix(coh, diff, weights, m, compute_coherent_only
                 npol = 3
 
             mat_diff = diff.compress(mode=m, auto_reduce_npol=True)
-            # weight is reduce to match the size of mat_diff, this is the case when we have total reflection
+            # weight is reduced to match the size of mat_diff, this is the case when we have total reflection
 
             full_weight = coef * np.repeat(weights[0:len(mat_diff) // npol], npol)