DOC: better to_xarray doc-string

Author: jreback

pandas/core/generic.py

@@ -1052,7 +1052,15 @@ def to_xarray(self):
 
         Examples
         --------
-        >>> df = DataFrame({'A' : [1, 2, 3], 'B' : ['foo', 'bar', 'baz']})
+        >>> df = pd.DataFrame({'A' : [1, 2, 3],
+                               'B' : ['foo', 'bar', 'baz'],
+                               'C' : np.arange(4.,7)})
+        >>> df
+           A    B    C
+        0  1  foo  4.0
+        1  2  bar  5.0
+        2  3  baz  6.0
+
         >>> df.to_xarray()
         <xarray.Dataset>
         Dimensions:  (index: 3)
@@ -1061,26 +1069,41 @@ def to_xarray(self):
         Data variables:
             A        (index) int64 1 2 3
             B        (index) object 'foo' 'bar' 'baz'
+            C        (index) float64 4.0 5.0 6.0
+
+        >>> p = pd.Panel(np.arange(24).reshape(4,3,2),
+                         items=list('ABCD'),
+                         major_axis=pd.date_range('20130101', periods=3),
+                         minor_axis=['first', 'second'])
+        >>> p
+        <class 'pandas.core.panel.Panel'>
+        Dimensions: 4 (items) x 3 (major_axis) x 2 (minor_axis)
+        Items axis: A to D
+        Major_axis axis: 2013-01-01 00:00:00 to 2013-01-03 00:00:00
+        Minor_axis axis: first to second
 
-        >>> p = pd.Panel(np.arange(6).reshape(3,2,1))
         >>> p.to_xarray()
-        <xarray.DataArray (items: 3, major_axis: 2, minor_axis: 1)>
-        array([[[0],
-               [1]],
-
-               [[2],
-               [3]],
-
-              [[4],
-              [5]]])
+        <xarray.DataArray (items: 4, major_axis: 3, minor_axis: 2)>
+        array([[[ 0,  1],
+                [ 2,  3],
+                [ 4,  5]],
+               [[ 6,  7],
+                [ 8,  9],
+                [10, 11]],
+               [[12, 13],
+                [14, 15],
+                [16, 17]],
+               [[18, 19],
+                [20, 21],
+                [22, 23]]])
         Coordinates:
-          * items       (items) int64 0 1 2
-          * major_axis  (major_axis) int64 0 1
-          * minor_axis  (minor_axis) int64 0
+          * items       (items) object 'A' 'B' 'C' 'D'
+          * major_axis  (major_axis) datetime64[ns] 2013-01-01 2013-01-02 2013-01-03  # noqa
+          * minor_axis  (minor_axis) object 'first' 'second'
 
         Notes
         -----
-        See also the `xarray docs <http://xarray.pydata.org/en/stable/>`__
+        See the `xarray docs <http://xarray.pydata.org/en/stable/>`__
         """
         import xarray
         if self.ndim == 1: