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"""
==================
Quiver Simple Demo
==================
A simple example of a `~.axes.Axes.quiver` plot with a `~.axes.Axes.quiverkey`.
For more advanced options refer to
:doc:`/gallery/images_contours_and_fields/quiver_demo`.
"""
import matplotlib.pyplot as plt
import numpy as np
X = np.arange(-10, 10, 1)
Y = np.arange(-10, 10, 1)
U, V = np.meshgrid(X, Y)
fig, ax = plt.subplots()
q = ax.quiver(X, Y, U, V)
ax.quiverkey(q, X=0.3, Y=1.1, U=10,
label='Quiver key, length = 10', labelpos='E')
plt.show()
# %%
#
# .. admonition:: References
#
# The use of the following functions, methods, classes and modules is shown
# in this example:
#
# - `matplotlib.axes.Axes.quiver` / `matplotlib.pyplot.quiver`
# - `matplotlib.axes.Axes.quiverkey` / `matplotlib.pyplot.quiverkey`
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