### Navigation

- index
- modules |
- home|
- examples|
- tutorials|
- pyplot|
- docs »

# Parametric Curve

This example demonstrates plotting a parametric curve in 3D.

    import matplotlib as mpl
    from mpl_toolkits.mplot3d import Axes3D
    import numpy as np
    import matplotlib.pyplot as plt

    mpl.rcParams['legend.fontsize'] = 10

    fig = plt.figure()
    ax = fig.gca(projection='3d')

    # Prepare arrays x, y, z
    theta = np.linspace(-4 * np.pi, 4 * np.pi, 100)
    z = np.linspace(-2, 2, 100)
    r = z**2 + 1
    x = r * np.sin(theta)
    y = r * np.cos(theta)

    ax.plot(x, y, z, label='parametric curve')
    ax.legend()

    plt.show()

Total running time of the script: ( 0 minutes 0.022 seconds)

Generated by Sphinx-Gallery