rolling documentation question

The current documentation for the DataArrayRolling refers to the windows as "exponential window." I think the object uses an unweighted approach (i.e, not exponentially rolling). Maybe this is this is copied over from the RollingExp object?

DataArrayRolling:

xarray/xarray/computation/rolling.py

Lines 280 to 282 in a96ea66

    
                   windows : mapping of hashable to int 
        
                       A mapping from the name of the dimension to create the rolling 
        
                       exponential window along (e.g. `time`) to the size of the moving window.

RollingExp:

xarray/xarray/computation/rolling_exp.py

Lines 58 to 60 in a96ea66

    
               windows : mapping of hashable to int (or float for alpha type) 
        
                   A mapping from the name of the dimension to create the rolling 
        
                   exponential window along (e.g. `time`) to the size of the moving window.

Similar question for DatasetRolling and Coarsen.

Thanks for any guidance.

p.s, running on linux, python3.9, with xarray 2023.12.0. and on linux, python3.12 with xarray 2025.12.0. Documentation citations are from current main branch.

Yes exactly; the windows for rolling and coarsen are unweighted. A PR to fix the docstring is very welcome

Will do.

rolling window doc update

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rolling documentation question #11093

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	windows : mapping of hashable to int
	A mapping from the name of the dimension to create the rolling
	exponential window along (e.g. `time`) to the size of the moving window.

	windows : mapping of hashable to int (or float for alpha type)
	A mapping from the name of the dimension to create the rolling
	exponential window along (e.g. `time`) to the size of the moving window.

rolling documentation question #11093

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dcherian commented on Jan 20, 2026

barronh commented on Jan 20, 2026

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