BUG: hidden ticklabels with sharex and secondary

Author: TomAugspurger

doc/source/whatsnew/v0.16.1.txt

@@ -161,3 +161,6 @@ Bug Fixes
 - Changed caching in ``AbstractHolidayCalendar`` to be at the instance level rather than at the class level as the latter can result in unexpected behaviour. (:issue:`9552`)
 
 - Fixed latex output for multi-indexed dataframes (:issue:`9778`)
+
+
+- Bug in hiding ticklabels with subplots and shared axes when adding a new plot to an existing grid of axes (:issue:`9158`)

pandas/tests/test_graphics.py

@@ -1534,6 +1534,19 @@ def test_subplots_ts_share_axes(self):
         for ax in axes[[0, 1, 2], [2]].ravel():
             self._check_visible(ax.get_yticklabels(), visible=False)
 
+    def test_subplots_sharex_axes_existing_axes(self):
+        # GH 9158
+        d = {'A': [1., 2., 3., 4.], 'B': [4., 3., 2., 1.], 'C': [5, 1, 3, 4]}
+        df = DataFrame(d, index=date_range('2014 10 11', '2014 10 14'))
+
+        axes = df[['A', 'B']].plot(subplots=True)
+        df['C'].plot(ax=axes[0], secondary_y=True)
+
+        self._check_visible(axes[0].get_xticklabels(), visible=False)
+        self._check_visible(axes[1].get_xticklabels(), visible=True)
+        for ax in axes.ravel():
+            self._check_visible(ax.get_yticklabels(), visible=True)
+
     def test_negative_log(self):
         df = - DataFrame(rand(6, 4),
                        index=list(string.ascii_letters[:6]),

pandas/tools/plotting.py

@@ -1040,7 +1040,10 @@ def _adorn_subplots(self):
         if len(self.axes) > 0:
             all_axes = self._get_axes()
             nrows, ncols = self._get_axes_layout()
-            _handle_shared_axes(all_axes, len(all_axes), len(all_axes), nrows, ncols, self.sharex, self.sharey)
+            _handle_shared_axes(axarr=all_axes, nplots=len(all_axes),
+                                naxes=nrows * ncols, nrows=nrows,
+                                ncols=ncols, sharex=self.sharex,
+                                sharey=self.sharey)
 
         for ax in to_adorn:
             if self.yticks is not None: