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"""
===============
stackplot(x, y)
===============
Draw a stacked area plot or a streamgraph.
See `~matplotlib.axes.Axes.stackplot`
"""
import matplotlib.pyplot as plt
import numpy as np
plt.style.use('_mpl-gallery')
# make data
x = np.arange(0, 10, 2)
ay = [1, 1.25, 2, 2.75, 3]
by = [1, 1, 1, 1, 1]
cy = [2, 1, 2, 1, 2]
y = np.vstack([ay, by, cy])
# plot
fig, ax = plt.subplots()
ax.stackplot(x, y)
ax.set(xlim=(0, 8), xticks=np.arange(1, 8),
ylim=(0, 8), yticks=np.arange(1, 8))
plt.show()
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