matplotlib
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diff --git a/‎lib/matplotlib/tests/baseline_images/test_spines/spines_data_positions.png‎
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@@ -15,6 +15,10 @@ For new features that were added to matplotlib, please see
 Changes in 1.3.x
 ================
 
+* Fixed a bug in setting the position for the right/top spine with data 
+  position type. Previously, it would draw the right or top spine at
+  +1 data offset.
+
 * In :class:`~matplotlib.patches.FancyArrow`, the default arrow head width,
   ``head_width``, has been made larger to produce a visible arrow head. The new
   value of this kwarg is ``head_width = 20 * width``.
 
@@ -323,6 +323,11 @@ def _calc_offset_transform(self):
                 self._spine_transform = ('identity',
                                          mtransforms.IdentityTransform())
         elif position_type == 'data':
+            if self.spine_type in ('right', 'top'):
+                # The right and top spines have a default position of 1 in
+                # axes coordinates.  When specifying the position in data
+                # coordinates, we need to calculate the position relative to 0.
+                amount -= 1
             if self.spine_type in ('left', 'right'):
                 self._spine_transform = ('data',
                                          mtransforms.Affine2D().translate(