.. only:: html .. note:: :class: sphx-glr-download-link-note Click :ref:here  to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_gallery_images_contours_and_fields_quiver_demo.py: ======================================= Advanced quiver and quiverkey functions ======================================= Demonstrates some more advanced options for ~.axes.Axes.quiver. For a simple example refer to :doc:/gallery/images_contours_and_fields/quiver_simple_demo. Note: The plot autoscaling does not take into account the arrows, so those on the boundaries may reach out of the picture. This is not an easy problem to solve in a perfectly general way. The recommended workaround is to manually set the Axes limits in such a case. .. code-block:: default import matplotlib.pyplot as plt import numpy as np X, Y = np.meshgrid(np.arange(0, 2 * np.pi, .2), np.arange(0, 2 * np.pi, .2)) U = np.cos(X) V = np.sin(Y) .. code-block:: default fig1, ax1 = plt.subplots() ax1.set_title('Arrows scale with plot width, not view') Q = ax1.quiver(X, Y, U, V, units='width') qk = ax1.quiverkey(Q, 0.9, 0.9, 2, r'$2 \frac{m}{s}$', labelpos='E', coordinates='figure') .. image:: /gallery/images_contours_and_fields/images/sphx_glr_quiver_demo_001.png :alt: Arrows scale with plot width, not view :class: sphx-glr-single-img .. code-block:: default fig2, ax2 = plt.subplots() ax2.set_title("pivot='mid'; every third arrow; units='inches'") Q = ax2.quiver(X[::3, ::3], Y[::3, ::3], U[::3, ::3], V[::3, ::3], pivot='mid', units='inches') qk = ax2.quiverkey(Q, 0.9, 0.9, 1, r'$1 \frac{m}{s}$', labelpos='E', coordinates='figure') ax2.scatter(X[::3, ::3], Y[::3, ::3], color='r', s=5) .. image:: /gallery/images_contours_and_fields/images/sphx_glr_quiver_demo_002.png :alt: pivot='mid'; every third arrow; units='inches' :class: sphx-glr-single-img .. rst-class:: sphx-glr-script-out Out: .. code-block:: none .. code-block:: default fig3, ax3 = plt.subplots() ax3.set_title("pivot='tip'; scales with x view") M = np.hypot(U, V) Q = ax3.quiver(X, Y, U, V, M, units='x', pivot='tip', width=0.022, scale=1 / 0.15) qk = ax3.quiverkey(Q, 0.9, 0.9, 1, r'$1 \frac{m}{s}$', labelpos='E', coordinates='figure') ax3.scatter(X, Y, color='0.5', s=1) plt.show() .. image:: /gallery/images_contours_and_fields/images/sphx_glr_quiver_demo_003.png :alt: pivot='tip'; scales with x view :class: sphx-glr-single-img ------------ References """""""""" The use of the following functions and methods is shown in this example: .. code-block:: default import matplotlib matplotlib.axes.Axes.quiver matplotlib.pyplot.quiver matplotlib.axes.Axes.quiverkey matplotlib.pyplot.quiverkey .. rst-class:: sphx-glr-script-out Out: .. code-block:: none .. rst-class:: sphx-glr-timing **Total running time of the script:** ( 0 minutes 1.665 seconds) .. _sphx_glr_download_gallery_images_contours_and_fields_quiver_demo.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-python :download:Download Python source code: quiver_demo.py  .. container:: sphx-glr-download sphx-glr-download-jupyter :download:Download Jupyter notebook: quiver_demo.ipynb  .. only:: html .. rst-class:: sphx-glr-signature Keywords: matplotlib code example, codex, python plot, pyplot Gallery generated by Sphinx-Gallery _