在python中为时间序列图添加水平限制线

I want to add horizontal upper and lower limit line for Temparature timeseries plot. Lets say upper limit line at 30 and lower limit line at 10.

df3.plot(x="Date", y=["Temp.PM", "Temp.AM"],figsize=(20,8))

解决方案

我觉得这个解决方案可以帮到你

import matplotlib.pyplot as plt
%matplotlib inline

df3.plot(x="Date", y=["Temp.PM", "Temp.AM"],figsize=(20,8))
plt.axhline(30)
plt.axhline(10)