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  • What should pad do about IndexVariables? · 3 ✖

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1047947800 https://github.com/pydata/xarray/issues/3868#issuecomment-1047947800 https://api.github.com/repos/pydata/xarray/issues/3868 IC_kwDOAMm_X84-dmoY benbovy 4160723 2022-02-22T16:02:21Z 2022-02-22T16:02:21Z MEMBER

Would it be conceivable to implement an alternative form of coordinate index which is explicitly a linear coordinate axis, storing only a first point and a step (possibly a last point but that would obviously be redundant with the length of the dimension)

It would be possible to do that after the explicit index refactor is complete (see https://github.com/pydata/xarray/projects/1).

5692 already adds several Xarray methods like isel, sel, concat, stack, roll, rename, etc. to the new Xarray Index base class so that it will be possible to provide alternative indexes as Index sub-classes with custom implementations.

We could certainly add an Index.pad method.

 
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   What should pad do about IndexVariables? 584461380
784607034 https://github.com/pydata/xarray/issues/3868#issuecomment-784607034 https://api.github.com/repos/pydata/xarray/issues/3868 MDEyOklzc3VlQ29tbWVudDc4NDYwNzAzNA== dcherian 2448579 2021-02-23T23:34:02Z 2021-02-23T23:34:02Z MEMBER

@fujiisoup's suggestions looks good to me. PRs welcome!

 
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   What should pad do about IndexVariables? 584461380
601411557 https://github.com/pydata/xarray/issues/3868#issuecomment-601411557 https://api.github.com/repos/pydata/xarray/issues/3868 MDEyOklzc3VlQ29tbWVudDYwMTQxMTU1Nw== fujiisoup 6815844 2020-03-19T20:53:30Z 2020-03-19T20:53:30Z MEMBER

How about passing an Index instead of just a simple integer to the pad method? ```python In [4]: da = xr.DataArray([0.5, 1.5, 2.5], dims=['x'], coords={'x': [0, 1, 2]})

In [5]: da
Out[5]: <xarray.DataArray (x: 3)> array([0.5, 1.5, 2.5]) Coordinates: * x (x) int64 0 1 2

In [8]: da.pad(x=([-1, -2], 0))
Out[8]: <xarray.DataArray (x: 5)> array([nan, nan, 0.5, 1.5, 2.5]) Coordinates: * x (x) int64 -1 -2 0 1 2 ```

 
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   What should pad do about IndexVariables? 584461380

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