issue_comments: 484956893

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https://github.com/pydata/xarray/issues/2907#issuecomment-484956893 https://api.github.com/repos/pydata/xarray/issues/2907 484956893 MDEyOklzc3VlQ29tbWVudDQ4NDk1Njg5Mw== 29361544 2019-04-19T16:59:17Z 2019-04-19T16:59:17Z NONE

Sooo many thanks for this ultrafast response. You're correct. What I didn't know was that the dimensions to multiply have to have the same names. I thought I could sum over different coordinates indicating the names within the dims keyword, but the implementation makes totally sense now. To summarize: Dimensions to sum over have to have the same name and the same ordering of the coordinate values (else f.e. a ValueError: indexes along dimension 'model name' are not equal is raised)

But shouldn't there be an error message if one specifies dimensions to dims that are not in both of the dataarrays?

 
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