issue_comments: 499761734

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https://github.com/pydata/xarray/pull/1597#issuecomment-499761734 https://api.github.com/repos/pydata/xarray/issues/1597 499761734 MDEyOklzc3VlQ29tbWVudDQ5OTc2MTczNA== 1386642 2019-06-07T05:28:51Z 2019-06-07T05:28:51Z CONTRIBUTOR

@benbovy

Is it expected behavior? I guess that not every combination is possible because we're not broadcasting here unlike to_array().

I believe so. In your third case, to_stacked_array basically wants to combine a and b into a DataArray with a dimension y. But that is not possible without broadcasting because b does not have a dimension y. I will try to add a more informative error message.

 
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