Merge pull request #10493 from clarkfitzg/histogram_label

ENH: GH10485 'Frequency' label for Series.plot

Author: shoyer

doc/source/whatsnew/v0.17.0.txt

@@ -143,3 +143,5 @@ Bug Fixes
 - Bug in `Series.from_csv` with ``header`` kwarg not setting the ``Series.name`` or the ``Series.index.name`` (:issue:`10483`)
 
 - Bug in `groupby.var` which caused variance to be inaccurate for small float values (:issue:`10448`)
+
+- Bug in ``Series.plot(kind='hist')`` Y Label not informative (:issue:`10485`)

pandas/tests/test_graphics.py

@@ -1001,12 +1001,12 @@ def test_kde_missing_vals(self):
     def test_hist_kwargs(self):
         ax = self.ts.plot(kind='hist', bins=5)
         self.assertEqual(len(ax.patches), 5)
-        self._check_text_labels(ax.yaxis.get_label(), 'Degree')
+        self._check_text_labels(ax.yaxis.get_label(), 'Frequency')
         tm.close()
 
         if self.mpl_ge_1_3_1:
             ax = self.ts.plot(kind='hist', orientation='horizontal')
-            self._check_text_labels(ax.xaxis.get_label(), 'Degree')
+            self._check_text_labels(ax.xaxis.get_label(), 'Frequency')
             tm.close()
 
             ax = self.ts.plot(kind='hist', align='left', stacked=True)

pandas/tools/plotting.py

@@ -2005,10 +2005,10 @@ def _make_plot(self):
     def _post_plot_logic(self):
         if self.orientation == 'horizontal':
             for ax in self.axes:
-                ax.set_xlabel('Degree')
+                ax.set_xlabel('Frequency')
         else:
             for ax in self.axes:
-                ax.set_ylabel('Degree')
+                ax.set_ylabel('Frequency')
 
     @property
     def orientation(self):