python - pandas_datareader 无法在 x 轴上打印日期

Question

在下面的绘图中，x 轴上未显示日期，如何显示日期时间戳

import  numpy as np
import pandas as pd
import  matplotlib.pyplot as plt
import datetime
import pandas_datareader as web
start=datetime.datetime(2014,1,8)
end =datetime.datetime(2019,1,8)
Tesla=web.DataReader('TSLA',"iex",start,end)
Ford=web.DataReader('F',"iex",start,end)
Tesla["open"].plot(label="Tesla",title="opening Price",figsize=(16,8))
plt.legend()
plt.show()

Answer 1

您的数据帧索引创建为 dtype 对象或字符串，让我们使用 pd.to_datetime 将索引转换为 DatetimeIndex:

import  numpy as np
import pandas as pd
import  matplotlib.pyplot as plt
import datetime
import pandas_datareader as web
start=datetime.datetime(2014,1,8)
end =datetime.datetime(2019,1,8)
Tesla=web.DataReader('TSLA',"iex",start,end)
Ford=web.DataReader('F',"iex",start,end)

#Change Telsa index to datetime dtype
Tesla.index = pd.to_datetime(Tesla.index)

#Let's do Fords too
Ford.index = pd.to_datetime(Ford.index)

Tesla["open"].plot(label="Tesla",title="opening Price",figsize=(16,8))
plt.legend()
plt.show()

输出: