理解subplot() vs. subplots() in matlabplot

matplotlib.pyplot.subplot(*args, **kwargs)

Add an Axes to the current figure or retrieve an existing Axes.

理解Axes&Backend in matplotlib

This is a wrapper of Figure.add_subplot which provides additional behavior when working with the implicit API.

matplotlib.pyplot.subplots(nrows=1, ncols=1, *, sharex=False, sharey=False, squeese=True, subplot_kw=None, gridspec_kw=None, **fig_kw)

Create a figure and a set of subplots;