.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "auto_examples/Markers/plot_arrows.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_auto_examples_Markers_plot_arrows.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_auto_examples_Markers_plot_arrows.py:


Arrows
======

Draw vector arrows on a 2-D image with
:meth:`~anyplotlib.figure_plots.Plot2D.add_arrows`.
Use ``markers["arrows"]["name"].set(...)`` to update them live.

.. GENERATED FROM PYTHON SOURCE LINES 9-29

.. code-block:: Python

    import numpy as np
    import anyplotlib as vw

    rng  = np.random.default_rng(3)
    data = rng.standard_normal((128, 128)).cumsum(0).cumsum(1)
    data = (data - data.min()) / (data.max() - data.min())
    xy   = np.linspace(0, 10, 128)

    fig, ax = vw.subplots(1, 1, figsize=(460, 460))
    v = ax.imshow(data, axes=[xy, xy], units="nm")

    tails = rng.uniform(15, 100, (8, 2))
    U     = rng.uniform(-18, 18, 8)
    V     = rng.uniform(-18, 18, 8)
    v.add_arrows(tails, U, V, name="flow",
                 edgecolors="#76ff03", linewidths=2.0,
                 label="flow vectors")

    fig





.. raw:: html

    <div style="display:block;text-align:center;line-height:0;margin:12px 0;"><iframe src="../../_static/viewer_widgets/sphx_glr_plot_arrows_001.html" frameborder="0" scrolling="no" style="width:476px;height:476px;border:none;overflow:hidden;display:inline-block;max-width:100%;"></iframe></div>






.. GENERATED FROM PYTHON SOURCE LINES 30-33

Live update
-----------
Change colour and width of every arrow in the group at once.

.. GENERATED FROM PYTHON SOURCE LINES 33-36

.. code-block:: Python


    v.markers["arrows"]["flow"].set(edgecolors="#ff9100", linewidths=2.5)
    fig




.. raw:: html

    <div style="display:block;text-align:center;line-height:0;margin:12px 0;"><iframe src="../../_static/viewer_widgets/sphx_glr_plot_arrows_002.html" frameborder="0" scrolling="no" style="width:476px;height:476px;border:none;overflow:hidden;display:inline-block;max-width:100%;"></iframe></div>







.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.055 seconds)


.. _sphx_glr_download_auto_examples_Markers_plot_arrows.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: plot_arrows.ipynb <plot_arrows.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: plot_arrows.py <plot_arrows.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: plot_arrows.zip <plot_arrows.zip>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_