matplotlib · dstansby · Mar 1, 2018 · Feb 27, 2018 · Feb 27, 2018 · Feb 28, 2018
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -2190,39 +2190,17 @@ def bar(self, *args, **kwargs):
                     adjust_xlim = True
                 x = 0
 
-        x, height, width, y, linewidth = np.broadcast_arrays(
-            # Make args iterable too.
-            np.atleast_1d(x), height, width, y, linewidth)
-
         if orientation == 'vertical':
             self._process_unit_info(xdata=x, ydata=height, kwargs=kwargs)
             if log:
                 self.set_yscale('log', nonposy='clip')
-
-            tick_label_axis = self.xaxis
-            tick_label_position = x
         elif orientation == 'horizontal':
             self._process_unit_info(xdata=width, ydata=y, kwargs=kwargs)
             if log:
                 self.set_xscale('log', nonposx='clip')
-
-            tick_label_axis = self.yaxis
-            tick_label_position = y
         else:
             raise ValueError('invalid orientation: %s' % orientation)
 
-        linewidth = itertools.cycle(np.atleast_1d(linewidth))
-        color = itertools.chain(itertools.cycle(mcolors.to_rgba_array(color)),
-                                # Fallback if color == "none".
-                                itertools.repeat([0, 0, 0, 0]))
-        if edgecolor is None:
-            edgecolor = itertools.repeat(None)
-        else:
-            edgecolor = itertools.chain(
-                itertools.cycle(mcolors.to_rgba_array(edgecolor)),
-                # Fallback if edgecolor == "none".
-                itertools.repeat([0, 0, 0, 0]))
-
         # lets do some conversions now since some types cannot be
         # subtracted uniformly
         if self.xaxis is not None:
@@ -2237,6 +2215,30 @@ def bar(self, *args, **kwargs):
             if yerr is not None:
                 yerr = self.convert_yunits(yerr)
 
+        x, height, width, y, linewidth = np.broadcast_arrays(
+            # Make args iterable too.
+            np.atleast_1d(x), height, width, y, linewidth)
+
+        # Now that units have been converted, set the tick locations.
+        if orientation == 'vertical':
+            tick_label_axis = self.xaxis
+            tick_label_position = x
+        elif orientation == 'horizontal':
+            tick_label_axis = self.yaxis
+            tick_label_position = y
+
+        linewidth = itertools.cycle(np.atleast_1d(linewidth))
+        color = itertools.chain(itertools.cycle(mcolors.to_rgba_array(color)),
+                                # Fallback if color == "none".
+                                itertools.repeat([0, 0, 0, 0]))
+        if edgecolor is None:
+            edgecolor = itertools.repeat(None)
+        else:
+            edgecolor = itertools.chain(
+                itertools.cycle(mcolors.to_rgba_array(edgecolor)),
+                # Fallback if edgecolor == "none".
+                itertools.repeat([0, 0, 0, 0]))
+
         # We will now resolve the alignment and really have
         # left, bottom, width, height vectors
         if align == 'center':

diff --git a/lib/matplotlib/testing/jpl_units/EpochConverter.py b/lib/matplotlib/testing/jpl_units/EpochConverter.py
@@ -101,7 +101,7 @@ def duration2float( value ):
       = RETURN VALUE
       - Returns the value parameter converted to floats.
       """
-      return value.days()
+      return value.seconds() / 86400.0
 
    #------------------------------------------------------------------------
    @staticmethod

diff --git a/lib/matplotlib/testing/jpl_units/__init__.py b/lib/matplotlib/testing/jpl_units/__init__.py
@@ -65,6 +65,7 @@ def register():
 
    mplU.registry[ str ] = StrConverter()
    mplU.registry[ Epoch ] = EpochConverter()
+   mplU.registry[ Duration ] = EpochConverter()
    mplU.registry[ UnitDbl ] = UnitDblConverter()
 
 #=======================================================================

diff --git a/lib/matplotlib/tests/baseline_images/test_units/jpl_bar_units.png b/lib/matplotlib/tests/baseline_images/test_units/jpl_bar_units.png
diff --git a/lib/matplotlib/tests/baseline_images/test_units/jpl_barh_units.png b/lib/matplotlib/tests/baseline_images/test_units/jpl_barh_units.png
diff --git a/lib/matplotlib/tests/test_units.py b/lib/matplotlib/tests/test_units.py
@@ -3,6 +3,7 @@
 from matplotlib.testing.decorators import image_comparison
 import matplotlib.units as munits
 import numpy as np
+import datetime
 
 try:
     # mock in python 3.3+
@@ -95,3 +96,37 @@ def test_plot_masked_units():
 
     fig, ax = plt.subplots()
     ax.plot(data_masked_units)
+
+
+@image_comparison(baseline_images=['jpl_bar_units'], extensions=['png'],
+                  savefig_kwarg={'dpi': 120}, style='mpl20')
+def test_jpl_bar_units():
+    from datetime import datetime
+    import matplotlib.testing.jpl_units as units
+    units.register()
+
+    day = units.Duration("ET", 24.0 * 60.0 * 60.0)
+    x = [0*units.km, 1*units.km, 2*units.km]
+    w = [1*day, 2*day, 3*day]
+    b = units.Epoch("ET", dt=datetime(2009, 4, 25))
+
+    fig, ax = plt.subplots()
+    ax.bar(x, w, bottom=b)
+    ax.set_ylim([b-1*day, b+w[-1]+1*day])
+
+
+@image_comparison(baseline_images=['jpl_barh_units'], extensions=['png'],
+                  savefig_kwarg={'dpi': 120}, style='mpl20')
+def test_jpl_barh_units():
+    from datetime import datetime
+    import matplotlib.testing.jpl_units as units
+    units.register()
+
+    day = units.Duration("ET", 24.0 * 60.0 * 60.0)
+    x = [0*units.km, 1*units.km, 2*units.km]
+    w = [1*day, 2*day, 3*day]
+    b = units.Epoch("ET", dt=datetime(2009, 4, 25))
+
+    fig, ax = plt.subplots()
+    ax.barh(x, w, left=b)
+    ax.set_xlim([b-1*day, b+w[-1]+1*day])