matplotlib/plot_types/unstructured/tricontour.py at main · map0logo/matplotlib · GitHub

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"""

===================

tricontour(x, y, z)

===================

See `~matplotlib.axes.Axes.tricontour`.

"""

import matplotlib.pyplot as plt

import numpy as np

plt.style.use('_mpl-gallery-nogrid')

# make data:

np.random.seed(1)

x = np.random.uniform(-3, 3, 256)

y = np.random.uniform(-3, 3, 256)

z = (1 - x/2 + x**5 + y**3) * np.exp(-x**2 - y**2)

levels = np.linspace(z.min(), z.max(), 7)

# plot:

fig, ax = plt.subplots()

ax.plot(x, y, 'o', markersize=2, color='lightgrey')

ax.tricontour(x, y, z, levels=levels)

ax.set(xlim=(-3, 3), ylim=(-3, 3))

plt.show()