issue_comments: 168138939

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https://github.com/pydata/xarray/issues/692#issuecomment-168138939 https://api.github.com/repos/pydata/xarray/issues/692 168138939 MDEyOklzc3VlQ29tbWVudDE2ODEzODkzOQ== 5635139 2015-12-31T07:20:11Z 2016-01-01T22:12:08Z MEMBER

Also peculiar - setting the coord to the original coord (saved above, but not shown here) causes the ds.date.dtype to report 'O', although not to display that in its repr, nor to cascade that for a DataArray extracted from it.

``` python In [80]:

ds.date = date ds, ds.date.dtype, ds['number 1'].date.dtype Out[80]: (<xray.Dataset> Dimensions: (date: 10) Coordinates: * date (date) int64 10957 10958 10959 10960 10961 10962 10963 10964 ... Data variables: number 1 (date) float64 0.1225 0.7202 0.5921 0.3005 0.8746 0.4186 ... number 2 (date) float64 0.1225 0.7202 0.5921 0.3005 0.8746 0.4186 ... number 3 (date) float64 0.1225 0.7202 0.5921 0.3005 0.8746 0.4186 ... number 4 (date) float64 0.1225 0.7202 0.5921 0.3005 0.8746 nan nan nan ..., dtype('O'), dtype('int64')) ```

Currently my workaround is ds=ds.assign_coords(**dict(date=date.to_index()))

 
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