issues: 390774883

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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
390774883 MDU6SXNzdWUzOTA3NzQ4ODM= 2605 Pad method 1217238 closed 0     9 2018-12-13T17:08:25Z 2020-03-19T14:41:49Z 2020-03-19T14:41:49Z MEMBER      

It would be nice to have a generic .pad() method to xarray objects based on numpy.pad and dask.array.pad.

In particular,pad with mode='wrap' could solve several use-cases related to periodic boundary conditions: https://github.com/pydata/xarray/issues/1005 , https://github.com/pydata/xarray/issues/2007. For example, ds.pad(longitude=(0, 1), mode='wrap') to add an extra point with periodic boundary conditions along the longitude dimension.

It probably makes sense to linearly extrapolate coordinates along padded dimensions, as long as they are regularly spaced. This might use heuristics and/or a keyword argument.

I don't have a plans to work on this in the near term. It could be a good project of moderate complexity for a new contributor.

 
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