matplotlib正弦和余弦图
代码：
1 # -*- coding: utf-8 -*- 2 """ 3 Created on Thu Jul 12 16:37:47 2018 4 5 @author: zhen 6 """ 7 """ 8 正弦和余弦图 9 """ 10 import matplotlib.pyplot as plt 11 12 import numpy as np 13 14 x = np.linspace(-np.pi, np.pi, 256, endpoint=True) 15 16 y_cos = np.cos(x) 17 y_sin = np.sin(x) 18 19 plt.plot(x, y_cos) 20 plt.plot(x, y_sin) 21 22 title("Function $\sin$ and $\cos$") 23 24 xlim(-3.6, 3.6) 25 ylim(-1.0, 1.0) 26 27 # format ticks at specific values 28 xticks([-np.pi, -np.pi/2, 0, np.pi/2, np.pi],[r'$-\pi$', r'$-\pi/2$', r'$0$', r'$+pi/2$', r'$+\pi$']) 29 yticks([-1, 0, +1],[r'$-1$', r'$0$', r'$+1$']) 30 31 plt.show()
结果：
