fix the unit-aware docs (#84)

* fix the links in [bf]fill

* generate a API page for DataArray.pint.loc

Author: keewis

docs/api.rst

@@ -39,7 +39,7 @@ DataArray
    :toctree: generated/
    :template: autosummary/accessor_attribute.rst
 
-   xarray.Dataset.pint.loc
+   xarray.DataArray.pint.loc
 
    xarray.DataArray.pint.magnitude
    xarray.DataArray.pint.units

pint_xarray/accessors.py

@@ -990,7 +990,7 @@ def drop_sel(self, labels=None, *, errors="raise", **labels_kwargs):
     def ffill(self, dim, limit=None):
         """unit-aware version of ffill
 
-        Like :py:meth:`DataArray.ffill` but without stripping the data units.
+        Like :py:meth:`xarray.DataArray.ffill` but without stripping the data units.
 
         See Also
         --------
@@ -1007,7 +1007,7 @@ def ffill(self, dim, limit=None):
     def bfill(self, dim, limit=None):
         """unit-aware version of bfill
 
-        Like :py:meth:`DataArray.bfill` but without stripping the data units.
+        Like :py:meth:`xarray.DataArray.bfill` but without stripping the data units.
 
         See Also
         --------
@@ -1751,7 +1751,7 @@ def drop_sel(self, labels=None, *, errors="raise", **labels_kwargs):
     def ffill(self, dim, limit=None):
         """unit-aware version of ffill
 
-        Like :py:meth:`Dataset.ffill` but without stripping the data units.
+        Like :py:meth:`xarray.Dataset.ffill` but without stripping the data units.
 
         See Also
         --------
@@ -1768,7 +1768,7 @@ def ffill(self, dim, limit=None):
     def bfill(self, dim, limit=None):
         """unit-aware version of bfill
 
-        Like :py:meth:`Dataset.bfill` but without stripping the data units.
+        Like :py:meth:`xarray.Dataset.bfill` but without stripping the data units.
 
         See Also
         --------