issue_comments: 458720920

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https://github.com/pydata/xarray/pull/2706#issuecomment-458720920 https://api.github.com/repos/pydata/xarray/issues/2706 458720920 MDEyOklzc3VlQ29tbWVudDQ1ODcyMDkyMA== 4711805 2019-01-29T21:50:14Z 2019-01-29T21:50:14Z CONTRIBUTOR

Hi @jendrikjoe,

Thanks for your PR, I am very interested in it because this is something I was hacking around (see here). In my particular case, I want to append along a time dimension, but it looks like your PR currently doesn't support it. In the following example ds2 should have a time dimension ranging from 2000-01-01 to 2000-01-06: ```python import xarray as xr import pandas as pd

ds0 = xr.Dataset({'temperature': (['time'], [50, 51, 52])}, coords={'time': pd.date_range('2000-01-01', periods=3)}) ds1 = xr.Dataset({'temperature': (['time'], [53, 54, 55])}, coords={'time': pd.date_range('2000-01-04', periods=3)})

ds0.to_zarr('temp') ds1.to_zarr('temp', mode='a', append_dim='time')

ds2 = xr.open_zarr('temp') But it's not the case: ds2.time <xarray.DataArray 'time' (time: 6)> array(['2000-01-01T00:00:00.000000000', '2000-01-02T00:00:00.000000000', '2000-01-03T00:00:00.000000000', '2000-01-01T00:00:00.000000000', '2000-01-02T00:00:00.000000000', '2000-01-03T00:00:00.000000000'], dtype='datetime64[ns]') Coordinates: * time (time) datetime64[ns] 2000-01-01 2000-01-02 ... 2000-01-03 ``` Maybe it's not intended to work with time dimensions yet?

 
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