How can I make a simple 3D line with Matplotlib?

To make a simple 3D line with matplotlib, we can take the following steps −

  • Create a new figure or activate an existing figure.

  • Add axes to the figure as part of a subplot arrangement.

  • Create data points for theta, z, r, x and using numpy.

  • Plot x, y and z using plot() method.

  • Place a legend on the figure using legend() method.

  • To display the figure, use show() method.


import numpy as np
from matplotlib import pyplot as plt
plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True
fig = plt.figure()
ax = fig.add_subplot(projection='3d')
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")


Updated on: 08-May-2021


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