您可以使用matplotlib在同一个图形上绘制多个函数，有几种方法可以实现这一点。
最简单的方法之一如图所示

import matplotlib.pyplot as plt
import numpy as np

# I will make up sample values of t
t = np.arange(1, 30, 2) # [1, 3, 5, ..29 1 to 29 increment by 2 

A = 6 / ( 4+ t ** 2) # function 1
B = 6 / ( 4 + t ** 3) # function 2
C = 18/( 3 * t) # making up random function here as function 3

# red dashes, blue squares and green triangles
# think of this as (x, y , color/symbols)

plt.plot(t, A, 'r--', t, B, 'bs', t, C, 'g^')
plt.show()

你应该有这样的