Explanation of fig, ax from plt.subplots() | Matplotlib - YouTube
Plot Organization in matplotlib — Your One-stop Guide | by Matias Calderini | Towards Data Science
Creating multiple subplots using plt.subplot — Matplotlib 3.1.0 documentation
Matplotlib on Twitter: "Have multiple plots that should share a colorbar? You can pass in a list/array of axes to fig.colorbar! fig, axes = plt. subplots(nrows=2, ncols=2); # loop over axes to plot