issues: 1317502063

What happened?

I have the following 2D DataArray ``` ldda ````

I can select a portion of it like so da1 = ldda.sel(component=0) da1

I can get what seems like an equivalent array (equal values, matching dtypes, etc.) in the following way: da2 = ldda.to_dataset(dim="component")[0] da2

And yet, while I can successfully plot da1... da1.plot()

Trying to do the same with da2 results in the following error... da2.plot()

AttributeError: 'int' object has no attribute 'startswith'

See below for full traceback and minimal working example.

What did you expect to happen?

I expected da1 and da2 to be functionally equivalent.

Minimal Complete Verifiable Example

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

da = xr.DataArray( data=np.asarray([[1, 2], [3, 4], [5, 6]]), dims=["x", "y"], )

da.sel(x=0).plot() # Succeeds da.to_dataset(dim='x')[0].plot() # Fails ```

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

```Python

AttributeError Traceback (most recent call last) /Volumes/scratch/neuropixels/t2_shared_projects/discoflow_v2/discoflow/analysis/ANPIX30/discoflow-day2/get_senzai_ic_loadings.ipynb Cell 18 in <cell line: 1>() ----> 1 da2.plot()

File /Volumes/scratch/neuropixels/t2_shared_envs/discoflow_v2/lib/python3.8/site-packages/xarray/plot/plot.py:866, in _PlotMethods.call(self, kwargs) 865 def call(self, kwargs): --> 866 return plot(self._da, **kwargs)

File /Volumes/scratch/neuropixels/t2_shared_envs/discoflow_v2/lib/python3.8/site-packages/xarray/plot/plot.py:332, in plot(darray, row, col, col_wrap, ax, hue, rtol, subplot_kws, kwargs) 328 plotfunc = hist 330 kwargs["ax"] = ax --> 332 return plotfunc(darray, kwargs)

File /Volumes/scratch/neuropixels/t2_shared_envs/discoflow_v2/lib/python3.8/site-packages/xarray/plot/plot.py:436, in line(darray, row, col, figsize, aspect, size, ax, hue, x, y, xincrease, yincrease, xscale, yscale, xticks, yticks, xlim, ylim, add_legend, _labels, args, kwargs) 432 xplt_val, yplt_val, x_suffix, y_suffix, kwargs = _resolve_intervals_1dplot( 433 xplt.to_numpy(), yplt.to_numpy(), kwargs 434 ) 435 xlabel = label_from_attrs(xplt, extra=x_suffix) --> 436 ylabel = label_from_attrs(yplt, extra=y_suffix) 438 _ensure_plottable(xplt_val, yplt_val) 440 primitive = ax.plot(xplt_val, yplt_val, args, **kwargs)

File /Volumes/scratch/neuropixels/t2_shared_envs/discoflow_v2/lib/python3.8/site-packages/xarray/plot/utils.py:491, in label_from_attrs(da, extra) 488 units = _get_units_from_attrs(da) ... 493 textwrap.wrap(name + extra + units, 60, break_long_words=False) 494 ) 495 else:

AttributeError: 'int' object has no attribute 'startswith' ```

Anything else we need to know?

Thank you for one of my favorite packages!

Environment

INSTALLED VERSIONS ------------------ commit: None python: 3.8.13 | packaged by conda-forge | (default, Mar 25 2022, 06:04:18) [GCC 10.3.0] python-bits: 64 OS: Linux OS-release: 5.4.0-122-generic machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: 1.12.2 libnetcdf: None xarray: 2022.3.0 pandas: 1.4.3 numpy: 1.21.0 scipy: 1.8.1 netCDF4: None pydap: None h5netcdf: None h5py: 3.7.0 Nio: None zarr: None cftime: None nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: 2022.7.0 distributed: None matplotlib: 3.5.1 cartopy: None seaborn: 0.11.2 numbagg: None fsspec: 2022.5.0 cupy: None pint: None sparse: None setuptools: 63.2.0 pip: 22.2 conda: None pytest: 7.1.2 IPython: 8.4.0 sphinx: None