issue_comments: 398582100

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https://github.com/pydata/xarray/issues/2237#issuecomment-398582100 https://api.github.com/repos/pydata/xarray/issues/2237 398582100 MDEyOklzc3VlQ29tbWVudDM5ODU4MjEwMA== 306380 2018-06-19T23:59:58Z 2018-06-19T23:59:58Z MEMBER

So if you're willing to humor me for a moment with dask.array examples, if you have an array that's currently partitioned by month:

x = da.ones((1000, ...), chunks=(30, ...))  # approximately

And you do something by time.dayofyear, what do you end up doing to the array in dask array operations? Sorry to be a bit slow here. I'm not as familiar with how XArray translates its groupby operations to dask.array operations under the hood.

 
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