issues: 39383188

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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
39383188 MDU6SXNzdWUzOTM4MzE4OA== 200 Support mathematical operators (+-*/, etc) for Dataset objects 1217238 closed 0   741199 0 2014-08-04T00:10:04Z 2014-09-07T04:18:05Z 2014-09-07T04:18:05Z MEMBER      

(Dataset, Dataset) operations like ds - ds should align based on the names of non-coordinates, and then pass all operations off to the DataArray objects. Even when we switch to doing automatic alignment, an exception should be raised if the intersection of non-coordinate names is empty.

(Dataset, DataArray) or (Dataset, ndarray) operations like ds - ds['x'] should simply map over the dataset non-coordinates. Note that this behaved is different from pandas, for which df - df['x'] will usually raise an exception: pandas aligns Series to DataFrame rows, following numpy's broadcasting rules.

This would be a nice complement to Dataset summary methods (#131).

 
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   completed 13221727 issue

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