issue_comments: 406449411

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https://github.com/pydata/xarray/issues/2298#issuecomment-406449411 https://api.github.com/repos/pydata/xarray/issues/2298 406449411 MDEyOklzc3VlQ29tbWVudDQwNjQ0OTQxMQ== 1217238 2018-07-20T00:02:34Z 2018-07-20T00:02:34Z MEMBER

Therefore, personally, I'd like to see this lazy math by implementing a lazy array. The API I thought of is .to_lazy() which converts the backend to the lazy array, as similar to that .chunk() converts the backend to dask array.

This is not a bad idea, but the version of lazy arithmetic that I have been contemplating (see https://github.com/pydata/xarray/pull/2302) is not yet complete. For example, it doesn't have any way to represent a lazy aggregation.

 
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