xarray.plot.contour not printing contour labels

Question

I am trying something like this:

import xarray as xr
import numpy as np

(lon,lat)=np.meshgrid(np.arange(0,6,1),np.arange(0,6,1))

da_data=xr.DataArray(data=np.random.randn(6,6),dims=['y','x'],
                     coords=dict(LAT=(['y','x'],lat), LON=(['y','x'],lon)) )
da_data.plot.contour(kwargs=dict(inline=True))

I can see the contours but no labels. What am I doing wrong?

user_3888719 · Answer

xarray.plot uses matplotlib as a backend, and you can replace your last line with the following, using matplotlib's Axis.clabel

fig, ax = plt.subplots()
CS = da_data.plot.contour(kwargs=dict(inline=True), ax=ax)
ax.clabel(CS)

See the matplotlib.contour.ContourLabeler.clabel documentation and the countour label demo for more info.

xarray.plot.contour not printing contour labels

1 Answers