InvLogTransform should only return masked arrays for masked inputs.

anntzer · anntzer · commit fe17c7508fd8 · 2021-12-16T23:02:37.000+01:00
This is similar to the approach in b218e7c, which made sure that SymmetricalLogTransform no longer returns masked arrays for nonmasked inputs.
diff --git a/lib/matplotlib/scale.py b/lib/matplotlib/scale.py
@@ -16,7 +16,6 @@
 import textwrap
 
 import numpy as np
-from numpy import ma
 
 import matplotlib as mpl
 from matplotlib import _api, docstring
@@ -251,7 +250,7 @@ def __str__(self):
         return "{}(base={})".format(type(self).__name__, self.base)
 
     def transform_non_affine(self, a):
-        return ma.power(self.base, a)
+        return np.power(self.base, a)
 
     def inverted(self):
         return LogTransform(self.base)
