add filter to cbook.safe_first_element to avoid returning masked values

astromancer · astromancer · commit 91f967063e38 · 2017-09-27T16:51:13.000+02:00
diff --git a/lib/matplotlib/cbook/__init__.py b/lib/matplotlib/cbook/__init__.py
@@ -2311,7 +2311,7 @@ def safe_first_element(obj):
             pass
         raise RuntimeError("matplotlib does not support generators "
                            "as input")
-    return next(filter(None, iter(obj)))
+    return next(filter(lambda e: not np.ma.is_masked(e), iter(obj)))
 
 
 def sanitize_sequence(data):
