issue_comments: 344385473

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https://github.com/pydata/xarray/issues/1042#issuecomment-344385473 https://api.github.com/repos/pydata/xarray/issues/1042 344385473 MDEyOklzc3VlQ29tbWVudDM0NDM4NTQ3Mw== 13906519 2017-11-14T20:20:38Z 2017-11-14T20:22:46Z NONE

I am seeing something similar, but maybe this is another issue (I'm on 0.10.0rc2)?

I do get a sorted string coordinate after a groupby...

My scenario is, that I have a dataset with a coord like this:

<xarray.DataArray 'pft' (pft: 13)> array(['TeBE_tm', 'TeBE_itm', 'TeBE_itscl', 'TeBE_tscl', 'TeBS_tm', 'TeBS_itm', 'TeE_s', 'TeR_s', 'TeNE', 'BBS_itm', 'BE_s', 'BS_s', 'C3G'], dtype='|S10') Coordinates: * pft (pft) |S10 'TeBE_tm' 'TeBE_itm' 'TeBE_itscl' 'TeBE_tscl' ... Then I create a new coordinate that I use to aggregate:

``` pfts = ds.coords['pft'].values.tolist() pfts_simplified = [remove(x) for x in pfts]

ds2['pft_agg'] = xr.full_like(ds['pft'], 0) ds2['pft_agg'][:] = pfts_simplified ds2_agg = ds2.groupby('pft_agg').sum(dim='pft', skipna=False) result = ds2_agg.rename({'pft_agg': 'pft'}) ```

Then in the end I have: ``` <xarray.DataArray 'pft' (pft: 8)> array(['BBS', 'B_s', 'C3G', 'TeBE', 'TeBE_scl', 'TeBS', 'TeNE', 'Te_s'], dtype=object) Coordinates: * pft (pft) object 'BBS' 'B_s' 'C3G' 'TeBE' 'TeBE_scl' 'TeBS' 'TeNE' ...

```

Am I missing something?

 
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