python - 向股票图表添加箭头

Question

我正在使用以下代码来显示股票数据：

from pandas.io.data import get_data_yahoo
import matplotlib.pyplot as plt 
data = get_data_yahoo("ADS", start = '2012-01-01', end = '2012-12-31')[['Close','Volume']] 
data.plot(subplots = True, figsize = (8, 8)); 
plt.title('Adidas-Aktie 2012')
plt.legend(loc = 'best')
plt.show()

在某些日期位置，我想添加直接指向图表的箭头。我怎样才能做到这一点？

Answer 1

尝试，

 from pandas.io.data import get_data_yahoo
 import matplotlib.pyplot as plt 
 data = get_data_yahoo("ADS", start = '2012-01-01', end = '2012-12-31' [['Close','Volume']] 
 ax = data.plot(subplots = True, figsize = (8, 8)); 
 plt.title('Adidas-Aktie 2012')
 plt.legend(loc = 'best')
 ax[0].annotate('your text',xy =(locx,locy), xytext=(locx,locy), arrowprops = dict(facecolor = 'black')) # assuming the you want to annotate the first plot
 plt.show()

在上面的代码中， (locx,locy) 是您想要注释的文本的位置