折线图笔记 -python

import numpy as np
import matplotlib.pyplot as plt
import math
u = 80  # 均值μ
sig = math.sqrt(20) # 标准差δ
x = np.linspace(u - 3*sig, u + 3*sig, 100)
x_y = np.linspace(u - 3*sig, u + 3*sig, 100)
x_y_sig = np.exp(-(x - u) ** 2 /(2* sig **2))/(math.sqrt(2*math.pi)*sig)

x_int = [ int(i) for i in x ]

print( x_int)
x_cloud = plt.plot(x_int, x_y_sig, "r-", linewidth=2)
print("="*20)


plt.grid(True)
plt.show()