python matplotlib 绘图+显示数值

参考：https://www.jb51.net/article/152685.htm

用plt.text函数

import numpy as np
import matplotlib.mlab as mlab
import matplotlib.pyplot as plt
......
for x,y in zip(X,Y):
 plt.text(x, y+0.05, '%.0f' % y, ha='center', va= 'bottom',fontsize=11)
......
plt.show()