DOC: cross ref the groupby tutorial

Author: jklymak

xarray/core/dataarray.py

@@ -6205,6 +6205,7 @@ def groupby(
         restore_coord_dims: bool = False,
     ) -> DataArrayGroupBy:
         """Returns a DataArrayGroupBy object for performing grouped operations.
+        See more details at :ref:`groupby`.
 
         Parameters
         ----------
@@ -6285,7 +6286,8 @@ def groupby_bins(
         """Returns a DataArrayGroupBy object for performing grouped operations.
 
         Rather than using all unique values of `group`, the values are discretized
-        first by applying `pandas.cut` [1]_ to `group`.
+        first by applying `pandas.cut` [1]_ to `group`.  See more details at
+        :ref:`groupby`.
 
         Parameters
         ----------

xarray/core/dataset.py

@@ -8911,6 +8911,7 @@ def groupby(
         restore_coord_dims: bool = False,
     ) -> DatasetGroupBy:
         """Returns a DatasetGroupBy object for performing grouped operations.
+        See more details at :ref:`groupby`.
 
         Parameters
         ----------
@@ -8969,6 +8970,7 @@ def groupby_bins(
         restore_coord_dims: bool = False,
     ) -> DatasetGroupBy:
         """Returns a DatasetGroupBy object for performing grouped operations.
+        See more details at :ref:`groupby`.
 
         Rather than using all unique values of `group`, the values are discretized
         first by applying `pandas.cut` [1]_ to `group`.