issues: 2202163545

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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
2202163545 I_kwDOAMm_X86DQllZ 8866 Cannot plot datetime.date dimension 24508496 closed 0     9 2024-03-22T10:18:04Z 2024-03-29T14:35:42Z 2024-03-29T14:35:42Z CONTRIBUTOR      

What happened?

I noticed that xarray doesnt support plotting when the x-axis is a datetime.date. In my case, I would like to plot hourly data aggregated by date. I know that in this particular case, I could just use .resample('1D') to achieve the same result and be able to plot it but I am wondering whether xarray shouldn't just also support plotting dates.

I am pretty sure that matplotlib supports date on the x-axis so maybe adding it to an acceptable type in plot/utils.py L675 in _ensure_plottable would already do the trick?

I am happy to look into this if this is a wanted feature.

What did you expect to happen?

No response

Minimal Complete Verifiable Example

```Python import xarray as xr import numpy as np import datetime start = datetime.datetime(2024, 1,1) time = [start + datetime.timedelta(hours=x) for x in range(720)]

data = xr.DataArray(np.random.randn(len(time)), coords=dict(time=('time', time))) data.groupby('time.date').mean().plot() ```

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.
  • [ ] Recent environment — the issue occurs with the latest version of xarray and its dependencies.

Relevant log output

Python TypeError: Plotting requires coordinates to be numeric, boolean, or dates of type numpy.datetime64, datetime.datetime, cftime.datetime or pandas.Interval. Received data of type object instead.

Anything else we need to know?

No response

Environment

INSTALLED VERSIONS ------------------ commit: None python: 3.10.13 (main, Aug 24 2023, 12:59:26) [Clang 15.0.0 (clang-1500.1.0.2.5)] python-bits: 64 OS: Darwin OS-release: 22.1.0 machine: arm64 processor: arm byteorder: little LC_ALL: None LANG: None LOCALE: (None, 'UTF-8') libhdf5: 1.12.2 libnetcdf: 4.9.3-development xarray: 2023.12.0 pandas: 2.1.4 numpy: 1.26.3 scipy: 1.12.0 netCDF4: 1.6.5 pydap: None h5netcdf: None h5py: None Nio: None zarr: 2.16.1 cftime: 1.6.3 nc_time_axis: 1.4.1 iris: None bottleneck: 1.3.7 dask: 2024.1.1 distributed: None matplotlib: 3.8.2 cartopy: None seaborn: None numbagg: None fsspec: 2023.12.2 cupy: None pint: None sparse: None flox: None numpy_groupies: None setuptools: 69.1.0 pip: 24.0 conda: None pytest: None mypy: None IPython: 8.21.0 sphinx: None 
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   completed 13221727 issue

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