Version 3.0.2
matplotlib

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Parametric CurveΒΆ

This example demonstrates plotting a parametric curve in 3D.

Traceback (most recent call last):
  File "/build/matplotlib-xz4j8t/matplotlib-3.1.2/examples/mplot3d/lines3d.py", line 1
    ================
    ^
SyntaxError: invalid syntax
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Parametric Curve
================

This example demonstrates plotting a parametric curve in 3D.
'''

# This import registers the 3D projection, but is otherwise unused.
from mpl_toolkits.mplot3d import Axes3D  # noqa: F401 unused import

import numpy as np
import matplotlib.pyplot as plt


plt.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()

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