Merge pull request pandas-dev#6935 from TomAugspurger/hist-fix

BUG: pass bins arg in hist_frame

Author: Tom Augspurger

pandas/tests/test_graphics.py

@@ -126,6 +126,12 @@ def test_hist(self):
         with tm.assertRaises(ValueError):
             self.ts.hist(by=self.ts.index, figure=fig)
 
+    @slow
+    def test_hist_bins(self):
+        df = DataFrame(np.random.randn(10, 2))
+        ax = df.hist(bins=2)[0][0]
+        self.assertEqual(len(ax.patches), 2)
+
     @slow
     def test_hist_layout(self):
         n = 10

pandas/tools/plotting.py

@@ -2342,7 +2342,7 @@ def hist_frame(data, column=None, by=None, grid=True, xlabelsize=None,
         ax = axes[i / cols, i % cols]
         ax.xaxis.set_visible(True)
         ax.yaxis.set_visible(True)
-        ax.hist(data[col].dropna().values, **kwds)
+        ax.hist(data[col].dropna().values, bins=bins, **kwds)
         ax.set_title(col)
         ax.grid(grid)