issues: 1473329967

This data as json

id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
1473329967 I_kwDOAMm_X85X0Tsv 7350 Coordinate variable gains coordinate on subset 221526 closed 0     5 2022-12-02T19:18:14Z 2022-12-05T22:56:30Z 2022-12-05T22:56:30Z CONTRIBUTOR      

What happened?

When subsetting a DataArray along a dimension down to a single item, the other coordinate variables gain this scalar coordinate.

What did you expect to happen?

Coordinate variables should not have their coordinates changed.

Minimal Complete Verifiable Example

```Python import numpy as np import xarray as xr

lat = np.array([25, 35, 45]) lon = np.array([-105, -95, -85, -75]) time = np.array([0, 1])

data = np.arange(lat.size * lon.size * time.size) test_data = xr.DataArray(data.reshape((time.size, lat.size, lon.size)), coords=dict(lat=lat, lon=lon, time=time), dims=('time', 'lat', 'lon'))

print(test_data.lat.coords) # Only 'lat' print(test_data.isel(time=0).lat.coords) # Has both 'lat' and 'time' pritn(test_data.isel(time=[0, 1]).lat.coords) # Only 'lat' ```

MVCE confirmation

  • [X] Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray.
  • [X] Complete example — the example is self-contained, including all data and the text of any traceback.
  • [X] Verifiable example — the example copy & pastes into an IPython prompt or Binder notebook, returning the result.
  • [X] New issue — a search of GitHub Issues suggests this is not a duplicate.

Relevant log output

No response

Anything else we need to know?

This occurs with both the latest 2022.11.0 release and current main.

Environment

INSTALLED VERSIONS ------------------ commit: None python: 3.10.8 | packaged by conda-forge | (main, Nov 22 2022, 08:31:57) [Clang 14.0.6 ] python-bits: 64 OS: Darwin OS-release: 21.6.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: 1.12.2 libnetcdf: 4.8.1 xarray: 2022.11.0 pandas: 1.5.2 numpy: 1.23.5 scipy: 1.9.3 netCDF4: 1.6.2 pydap: None h5netcdf: None h5py: None Nio: None zarr: None cftime: 1.6.2 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: 0.9.10.2 iris: None bottleneck: 1.3.5 dask: 2022.6.1 distributed: 2022.6.1 matplotlib: 3.6.2 cartopy: 0.21.0 seaborn: None numbagg: None fsspec: 2022.11.0 cupy: None pint: 0.20.1 sparse: None flox: None numpy_groupies: None setuptools: 65.5.1 pip: 22.3.1 conda: None pytest: 7.2.0 IPython: 8.6.0 sphinx: 5.3.0 
{
    "url": "https://api.github.com/repos/pydata/xarray/issues/7350/reactions",
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
   completed 13221727 issue

Links from other tables