Adding documentation

Author: joshuastorck

doc/source/computation.rst

@@ -250,6 +250,10 @@ accept the following arguments:
   result is NA)
 - ``center``: boolean, whether to set the labels at the center (default is False)
 
+.. note::
+
+   The ``.min()`` and ``.max()`` will by default return the result as a float. For integer inputs, integer outputs can be obtained by passing ``as_float``=False
+
 .. warning::
 
    The ``freq`` and ``how`` arguments were in the API prior to 0.18.0 changes. These are deprecated in the new API. You can simply resample the input prior to creating a window function.

doc/source/whatsnew/v0.18.0.txt

@@ -871,6 +871,7 @@ Other API Changes
 
 - More helpful error message when constructing a ``DataFrame`` with empty data but with indices (:issue:`8020`)
 
+- ``Rolling.min`` and ``Rolling.max`` now take an as_float argument, that when False, will cause those functions to return output that has the same value as the input type. This is 
 
 .. _whatsnew_0180.deprecations:
 
@@ -1123,3 +1124,4 @@ Bug Fixes
 - Bug in ``DataFrame.apply`` in which reduction was not being prevented for cases in which ``dtype`` was not a numpy dtype (:issue:`12244`)
 - Bug when initializing categorical series with a scalar value. (:issue:`12336`)
 - Bug when specifying a UTC ``DatetimeIndex`` by setting ``utc=True`` in ``.to_datetime`` (:issue:`11934`)
+- Bug in ``.rolling.min`` and ``.rolling.max`` where passing columns of type float32 raised a Value error (:issue:`12373`)