issues: 232623945

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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
232623945 MDU6SXNzdWUyMzI2MjM5NDU= 1435 xarray.plot.imshow with datetime coordinates results in blank plot 500246 open 0     6 2017-05-31T16:31:30Z 2022-05-03T01:56:37Z   CONTRIBUTOR      

``` In [72]: da = xarray.DataArray(arange(5*6).reshape(5,6), dims=("A", "B"), coords={"A": arange(5), "B": pd.date_range("2000-01-01", periods=6)})

In [73]: da.plot.imshow() Out[73]: <matplotlib.image.AxesImage at 0x7f699cf1acf8> ```

The resulting plot has the correct axes and colorbar, but the contents of the plot itself are blank. Upon moving the cursor over the plot, there is an exception in Tkinter:

Exception in Tkinter callback Traceback (most recent call last): File "/home/users/gholl/lib/python3.5/tkinter/__init__.py", line 1549, in __call__ return self.func(*args) File "/dev/shm/gerrit/venv/stable-3.5/lib/python3.5/site-packages/matplotlib/backends/backend_tkagg.py", line 387, in motion_notify_event FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event) File "/dev/shm/gerrit/venv/stable-3.5/lib/python3.5/site-packages/matplotlib/backend_bases.py", line 1966, in motion_notify_event self.callbacks.process(s, event) File "/dev/shm/gerrit/venv/stable-3.5/lib/python3.5/site-packages/matplotlib/cbook.py", line 554, in process proxy(*args, **kwargs) File "/dev/shm/gerrit/venv/stable-3.5/lib/python3.5/site-packages/matplotlib/cbook.py", line 416, in __call__ return mtd(*args, **kwargs) File "/dev/shm/gerrit/venv/stable-3.5/lib/python3.5/site-packages/matplotlib/backend_bases.py", line 2857, in mouse_move artists = [a for a in event.inaxes.mouseover_set File "/dev/shm/gerrit/venv/stable-3.5/lib/python3.5/site-packages/matplotlib/backend_bases.py", line 2858, in <listcomp> if a.contains(event) and a.get_visible()] File "/dev/shm/gerrit/venv/stable-3.5/lib/python3.5/site-packages/matplotlib/image.py", line 567, in contains inside = ((x >= xmin) and (x <= xmax) and TypeError: invalid type promotion

 
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     13221727 issue

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