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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
258735262 MDU6SXNzdWUyNTg3MzUyNjI= 1578 Contourplot not producing plot when data below colorbar level and extend='neither' jorgsk 761677 open 0     7 2017-09-19T08:23:14Z 2019-03-29T22:44:15Z   NONE      

I'm plotting several datasets on a map with contourf with the same colorbar levels where some datasets have no data above the lowest level. I expect these plots to simply be blank. The default behavior is instead that 'extend' becomes set to 'min' behind the scenes, changing the colorabar relative to the other plots. When I set extend to 'neither' explicitly, I get an error from matplotlib: "ValueError: 'bboxes' cannot be empty". The plot call looks like this:

data.plot.contourf(ax=ax, transform=ccrs.PlateCarree(), vmin=levels[0], vmax=levels[-1], levels=levels, cmap=plt.get_cmap('viridis_r'), extend='neither', extent=(-17, 25, 52, 73)

I found that if I revert this bug-fixe from Cartopy: https://github.com/SciTools/cartopy/issues/811 I get the expected behavior.

Not sure if this issue should go to Cartopy but I'm starting here.

Matplotlib version 2.0.0 Xarray version 0.9.6 Cartopy version 0.15.1

 
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     xarray 13221727 issue

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