issues: 307783090

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
307783090 MDU6SXNzdWUzMDc3ODMwOTA= 2007 rolling: allow control over padding 10194086 open 0     20 2018-03-22T19:27:07Z 2021-07-14T19:10:47Z   MEMBER      

Code Sample, a copy-pastable example if possible

```python import numpy as np import xarray as xr

x = np.arange(1, 366) y = np.random.randn(365) ds = xr.DataArray(y, dims=dict(dayofyear=x))

ds.rolling(center=True, dayofyear=31).mean() ```

Problem description

rolling cannot directly handle periodic boundary conditions (lon, dayofyear, ...), but could be very helpful to e.g. calculate climate indices. Also I cannot really think of an easy way to append the first elements to the end of the dataset and then calculate rolling.

Is there a way to do this? Should xarray support this feature?

This might also belong to SO...

 
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     13221727 issue

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