import numpy as np
import matplotlib.pyplot as plt

A = 1
w = 6.28
delta = 2

def onde(x,t):
    return(A*np.exp(-x/delta)*np.cos(w*t))
    
x=np.linspace(0,10,1000)

for t in np.arange(0,4,0.05):

    plt.clf()
    plt.axis([0,10,-1.5,1.5])
    plt.xlabel('abscisse x')
    plt.ylabel("fonction d'onde s")   
    plt.plot(x,onde(x,t))
    plt.grid()
    plt.pause(0.01)