Fix ScalarFormatter formatting of masked values

dstansby · dstansby · commit e9be828388c9 · 2019-08-27T10:01:45.000+01:00
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
@@ -629,6 +629,8 @@ def format_data_short(self, value):
         """
         if self._useLocale:
             return locale.format_string('%-12g', (value,))
+        elif isinstance(value, np.ma.MaskedArray) and value.mask:
+            return ''
         else:
             return '%-12g' % value
 
