issue_comments: 596837204

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https://github.com/pydata/xarray/pull/3596#issuecomment-596837204 https://api.github.com/repos/pydata/xarray/issues/3596 596837204 MDEyOklzc3VlQ29tbWVudDU5NjgzNzIwNA== 5635139 2020-03-10T00:08:11Z 2020-03-10T00:08:11Z MEMBER

In some instances extrapolating all coords, can lead to some unwanted behaviour. Would you suggest we only interpolate the indexes?

How would we handle unsorted indexes?

How would we extrapolate all the different kind of indexes, like the MultiIndex or CategoricalIndex?

I agree; I can't see easy solutions to these. If there are evenly spaced indexes (e.g. dates, grids), then it's easy to know what to do. But there are plenty of times it's difficult, if not intractable.

One option to merge something useful without resolving these questions is to return Variables only and label this method experimental. I think this is immediately useful for the cases where these difficult questions don't need to be answered.

Of course if there are good answers to the questions, then even better!

 
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