[python] pandas subplot

fig, axes = plt.subplots(nrows=2, ncols=2)
fig.set_figheight(6)
fig.set_figwidth(8)
df[0].plot(ax=axes[0,0], style='r', label='Series'); axes[0,0].set_title(0)
df[1].plot(ax=axes[0,1]); axes[0,1].set_title(1)
df[2].plot(ax=axes[1,0]); axes[1,0].set_title(2)
df[3].plot(ax=axes[1,1]); axes[1,1].set_title(3)
fig.tight_layout()