"""
=============
triplot(x, y)
=============

See `~matplotlib.axes.Axes.triplot`.
"""
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, 256, size=250)
xsamp = np.random.randint(0, 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()