Matplotlib: Creating Colorbar

I've almost reached my goal because of the great help of this community. I explained my goal here before: matplotlib: assign color to a radius I now have exactly the plot I wanted.

Solution 1:

This should do it:

import matplotlib as mpl

cax, _ = mpl.colorbar.make_axes(plt.gca(), shrink=0.8)
cbar = mpl.colorbar.ColorbarBase(cax, cmap='jet', label='some label',
                       norm=mpl.colors.Normalize(vmin=0., vmax=1.))

Result: