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  • Feature request: Assign coords for new axis in xr.concat · 3 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
457862768 https://github.com/pydata/xarray/issues/839#issuecomment-457862768 https://api.github.com/repos/pydata/xarray/issues/839 MDEyOklzc3VlQ29tbWVudDQ1Nzg2Mjc2OA== stale[bot] 26384082 2019-01-26T20:18:48Z 2019-01-26T20:18:48Z NONE

In order to maintain a list of currently relevant issues, we mark issues as stale after a period of inactivity If this issue remains relevant, please comment here; otherwise it will be marked as closed automatically

 
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   Feature request: Assign coords for new axis in xr.concat  152061016
240554085 https://github.com/pydata/xarray/issues/839#issuecomment-240554085 https://api.github.com/repos/pydata/xarray/issues/839 MDEyOklzc3VlQ29tbWVudDI0MDU1NDA4NQ== shoyer 1217238 2016-08-17T21:26:47Z 2016-08-17T21:26:47Z MEMBER

Indeed coords is a bad keyword argument name. On concat it indicates which coordinates from the concatenated objects should be concatenated. It probably should be renamed something like which_coords. It's not a way to set new coordinates.

So you can actually do this right now if you provide a DataArray or pandas.Index as the argument dim argument to concat.

Instead of:

DA_data = xr.concat(list(D_patient_DA.values()), dim="Patients") DA_data.coords["Patients"] = list(D_patient_DA.keys())

you could write:

DA_data = xr.concat(list(D_patient_DA.values()), dim=pandas.Index(D_patient_DA.keys(), name='Patients'))

But in this particular case (converting a dictionary to a DataArray), you can actually just use the Dataset.to_array() method instead, e.g., xr.Dataset(D_patient_DA).to_array(dim='Patients')

 
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   Feature request: Assign coords for new axis in xr.concat  152061016
240330864 https://github.com/pydata/xarray/issues/839#issuecomment-240330864 https://api.github.com/repos/pydata/xarray/issues/839 MDEyOklzc3VlQ29tbWVudDI0MDMzMDg2NA== MathieuSchopfer 17726101 2016-08-17T07:07:25Z 2016-08-17T07:07:25Z NONE

I don't think the coords key word argument is meant to specify new coordinates. Though, it would be really nice if it were possible to concatenate along a new dimension and easily provide the new coordinates in one line.

Would it possible to make this thread a feature request ?

 
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   Feature request: Assign coords for new axis in xr.concat  152061016

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