issues: 1176172498

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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
1176172498 I_kwDOAMm_X85GGvfS 6399 DataArray.plot.pcolormesh with kwarg shading='gouraud' 9312831 closed 0     4 2022-03-22T02:09:36Z 2022-03-22T10:14:18Z 2022-03-22T10:14:18Z NONE      

What happened?

Given a DataArray da, I try to plot with python da.plot.pcolormesh(shading='flat') and it works well. But if I change shading to 'gouraud', it reports ``` python C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\axes_axes.py in _pcolorargs(self, funcname, shading, args, *kwargs) 5709 else: # ['nearest', 'gouraud']: 5710 if (Nx, Ny) != (ncols, nrows): -> 5711 raise TypeError('Dimensions of C %s are incompatible with' 5712 ' X (%d) and/or Y (%d); see help(%s)' % ( 5713 C.shape, Nx, Ny, funcname))

TypeError: Dimensions of C (256, 512) are incompatible with X (513) and/or Y (257); see help(pcolormesh) ```

Not sure if this relates to xarray or matplotlib.

What did you expect to happen?

python da.plot.pcolormesh(shading='gouraud') should works well as python da.plot.pcolormesh(shading='flat')

Minimal Complete Verifiable Example

```Python import xarray as xr

ds = xr.tutorial.open_dataset('air_temperature') ds.air[0].plot.pcolormesh(shading='gouraud') ```

Relevant log output

```Python C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\axes_axes.py in _pcolorargs(self, funcname, shading, args, *kwargs) 5709 else: # ['nearest', 'gouraud']: 5710 if (Nx, Ny) != (ncols, nrows): -> 5711 raise TypeError('Dimensions of C %s are incompatible with' 5712 ' X (%d) and/or Y (%d); see help(%s)' % ( 5713 C.shape, Nx, Ny, funcname))

TypeError: Dimensions of C (25, 53) are incompatible with X (54) and/or Y (26); see help(pcolormesh) ```

Anything else we need to know?

No

Environment

INSTALLED VERSIONS

commit: None python: 3.8.11 (default, Aug 6 2021, 09:57:55) [MSC v.1916 64 bit (AMD64)] python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 60 Stepping 3, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: ('Chinese (Simplified)_China', '936') libhdf5: 1.12.1 libnetcdf: 4.8.1

xarray: 0.19.0 pandas: 1.3.1 numpy: 1.20.3 scipy: 1.6.2 netCDF4: 1.5.8 pydap: installed h5netcdf: 0.12.0 h5py: 3.4.0 Nio: None zarr: 2.8.1 cftime: 1.6.0 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: 0.9.9.1 iris: None bottleneck: 1.3.2 dask: 2021.08.0 distributed: 2021.08.0 matplotlib: 3.4.2 cartopy: 0.18.0 seaborn: 0.11.2 numbagg: None pint: None setuptools: 52.0.0.post20210125 pip: 21.0.1 conda: 4.11.0 pytest: 6.2.4 IPython: 7.26.0 sphinx: 4.0.2

 
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