1 import numpy as np
2 import matplotlib.pyplot as plt
3
4 a = np.arange(0.0,5,0.02)
5 plt.plot(a,np.cos(2*np.pi*a),'r--')
6 plt.xlabel('横轴：时间',fontproperties='SimHei',fontsize=15,color='green')
7 plt.ylabel('纵轴：振幅',fontproperties='SimHei',fontsize=15)
8 plt.title('正弦波实例$y=cos(2pi x)$',fontproperties='SimHei',fontsize=25)
9 plt.text(2,1,'$mu=100$',fontsize=15)
10
11 plt.axis([-1,6,-2,2])
12 plt.grid(True)
13 plt.show()
plt.annotate(s,xy=arrow_crd,xytext=text_crd,arrowprops=dict)
1 import numpy as np
2 import matplotlib.pyplot as plt
3
4 a = np.arange(0.0,5,0.02)
5 plt.plot(a,np.cos(2*np.pi*a),'r--')
6
7 plt.xlabel('横轴：时间',fontproperties='SimHei',fontsize=15,color='green')
8 plt.ylabel('纵轴：振幅',fontproperties='SimHei',fontsize=15)
9 plt.title('正弦波实例$y=cos(2pi x)$',fontproperties='SimHei',fontsize=25)
10 plt.annotate('$mu=100$',xy=(2,1),xytext=(3,1.5),arrowprops=dict(facecolor='black',shrink=0.1,width=2))
11
12 plt.axis([-1,6,-2,2])
13 plt.grid(True)
14 plt.show()
