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"""

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

triplot(x, y, [triangle])

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

"""

import matplotlib.pyplot as plt

import numpy as np

plt.style.use('mpl_plot_gallery')

# make structured data

X, Y = np.meshgrid(np.linspace(-3, 3, 256), np.linspace(-3, 3, 256))

# sample it to make x, y, z

np.random.seed(1)

ysamp = np.random.randint(0, high=256, size=250)

xsamp = np.random.randint(0, high=256, size=250)

y = Y[:, 0][ysamp]

x = X[0, :][xsamp]

# plot:

fig, ax = plt.subplots()

ax.triplot(x, y)

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

plt.show()