Plot 3D parametric curves with matplotlib

a code

1. import matplotlib as mpl
2. from mpl_toolkits.mplot3d importAxes3D
3. import numpy as np
4. import matplotlib.pyplot as plt
6. mpl.rcParams['legend.fontsize']=10#图例字号
7. fig = plt.figure()
8. ax = fig.gca(projection='3d')#三维图形
9. theta = np.linspace(-4* np.pi,4* np.pi,100)
10. z = np.linspace(-4,4,100)*0.3#测试数据
11. r = z**3+1
12. x = r * np.sin(theta)
13. y = r * np.cos(theta)
14. ax.plot(x, y, z, label='parametric curve')
15. ax.legend()
16. plt.show()

Second run results