Merge pull request #13398 from jklymak/fix-boxplot-pandas

NelleV · web-flow · commit 288405891e47 · 2019-02-19T09:34:42.000-08:00
FIX: let pandas IndexInt64 work for boxplot
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -4029,6 +4029,10 @@ def dopatch(xs, ys, **kwargs):
         elif len(positions) != N:
             raise ValueError(datashape_message.format("positions"))
 
+        positions = np.array(positions)
+        if len(positions) > 0 and not isinstance(positions[0], Number):
+            raise TypeError("positions should be an iterable of numbers")
+
         # width
         if widths is None:
             widths = [np.clip(0.15 * np.ptp(positions), 0.15, 0.5)] * N
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -1525,6 +1525,15 @@ def test_bar_timedelta():
                    (10, 20))
 
 
+def test_boxplot_dates_pandas(pd):
+    # smoke test for boxplot and dates in pandas
+    data = np.random.rand(5, 2)
+    years = pd.date_range('1/1/2000',
+                          periods=2, freq=pd.DateOffset(years=1)).year
+    plt.figure()
+    plt.boxplot(data, positions=years)
+
+
 def test_bar_pandas(pd):
     # Smoke test for pandas
 
