指数衰减

e0=0.5
a=-0.1
t=0
epsilon=[]
b=[]
import numpy as np
import math
import matplotlib.pyplot  as plt
for i in range(100):
    epsilon.append(e0 * math.exp(a*i))
    #print(epsilon)
    b.append(i)
plt.plot(b,epsilon)
plt.show()