issue_comments: 830713676

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https://github.com/pydata/xarray/issues/5240#issuecomment-830713676 https://api.github.com/repos/pydata/xarray/issues/5240 830713676 MDEyOklzc3VlQ29tbWVudDgzMDcxMzY3Ng== 5635139 2021-05-02T00:15:43Z 2021-05-02T00:15:43Z MEMBER

Agree that this should coerce to the name of the dim if the array has no name.

Technically should the kwarg of concat be coord rather than dim? I generally supply dim names there, rather than coords vars. (though I'm not suggesting we actually change it given the backward-compat).

Note that we already do this in the DataArray constructor:

```python

In [12]: a = xr.DataArray([0,1], coords=[xr.DataArray([1,2])], dims='b') # No name on the coord

In [13]: a Out[13]: <xarray.DataArray (b: 2)> array([0, 1]) Coordinates: * b (b) int64 1 2 # Yes name on the coord ```

 
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