Python matplotlib，图上的时间戳

Question

我在下面有一个简单的基本脚本，它将创建一些数据的散点图，我很好奇它是否可能用于创建图表时的日期和时间戳 也被纳入情节？...就像情节角落里的小东西之类的？？...感谢您的任何提示

import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

df = pd.read_csv('C:\\Users\\HVAC-AHU-Economizer-Diagnostics-master\\AHU3 data CSV.csv', index_col='Date', parse_dates=True)


OAT = pd.Series(df['OAT'])
RAT = pd.Series(df['RAT'])
MAT = pd.Series(df['MAT'])

df_OATrat = (OAT - RAT)
df_MATrat = (MAT - RAT)

plt.scatter(df_OATrat,df_MATrat, color='grey', marker='+')
plt.xlabel('OAT-RAT')
plt.ylabel('MAT-RAT')
plt.title('Economizer Diagnostics')

plt.plot([0,-18],[0,-18], color='green', label='100% OSA during ideal conditions')
plt.plot([0,20],[0,5], color='red', label='Minimum OSA in cooling mode')
plt.plot([0,-38],[0,-9.5], color='blue', label='Minimum OSA in heating mode')
plt.plot([0,0],[-20,10], color='black')
plt.plot([-30,20],[0,0], color='black')
plt.legend()

plt.savefig('static/plot.png')

Answer 1

尝试使用带有 datetime.now() 值的文本框： https://matplotlib.org/api/_as_gen/matplotlib.pyplot.text.html