FIX: let boxplot take pandas position

jklymak · jklymak · commit 34f9ee04f56e · 2018-07-15T20:26:41.000-07:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -3643,10 +3643,10 @@ def dopatch(xs, ys, **kwargs):
         N = len(bxpstats)
         datashape_message = ("List of boxplot statistics and `{0}` "
                              "values must have same the length")
-        # check position
         if positions is None:
             positions = list(range(1, N + 1))
-        elif len(positions) != N:
+        positions = self.convert_xunits(positions)
+        if len(positions) != N:
             raise ValueError(datashape_message.format("positions"))
 
         # width
@@ -5678,7 +5678,7 @@ def pcolormesh(self, *args, alpha=None, norm=None, cmap=None, vmin=None,
 
         # convert to one dimensional arrays
         C = C.ravel()
-        coords = np.column_stack((X, Y)).astype(float, copy=False)
+        coords = np.column_stack((X, Y)).astype(float)
         collection = mcoll.QuadMesh(Nx - 1, Ny - 1, coords,
                                     antialiased=antialiased, shading=shading,
                                     **kwargs)
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
@@ -4,6 +4,7 @@
 
 import datetime
 import logging
+import numbers
 import warnings
 
 import numpy as np
@@ -1508,9 +1509,14 @@ def have_units(self):
         return self.converter is not None or self.units is not None
 
     def convert_units(self, x):
-        # If x is already a number, doesn't need converting
+        # If x is already a number, doesn't need converting, but
+        # some iterables need to be massaged a bit...
         if munits.ConversionInterface.is_numlike(x):
-            return x
+            if isinstance(x, list) or isinstance(x, numbers.Number):
+                return x
+            if issubclass(type(x), np.ma.MaskedArray):
+                return np.ma.asarray(x)
+            return np.asarray(x)
 
         if self.converter is None:
             self.converter = munits.registry.get_converter(x)
