# !/usr/bin/env python
# Diff courbes
#

import matplotlib.pyplot as plt
import numpy as np

a=[[0,20],[10,25],[40,50],[70,90],[80,110],[100,150],[120,100]]
b=[[5,15],[15,20],[40,55],[65,100],[90,140],[110,121],[125,100],[140,80]]

ax_l=[0,10,40,70,80,100,120]
ay_l=[20,25,50,90,110,150,100]

bx_l=[5,15,40,65,90,110,125,140]
by_l=[15,20,55,100,140,121,100,80]

ba_l=np.interp(ax_l,bx_l,by_l)
cy_l=(ay_l+ba_l)/2


#Creation de l'image:

plt.plot(ax_l,ay_l)
plt.plot(bx_l,by_l)
plt.plot(ax_l,cy_l,"k--")
plt.grid(True)

plt.show()

# fin du programme