.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "auto_examples/Markers/arrows_navigation.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_arrows_navigation.py>`
        to download the full example code.

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

.. _sphx_glr_auto_examples_Markers_arrows_navigation.py:


Arrow markers
=============

.. GENERATED FROM PYTHON SOURCE LINES 7-8

Create a signal

.. GENERATED FROM PYTHON SOURCE LINES 8-20

.. code-block:: Python


    import hyperspy.api as hs
    import numpy as np

    # Create a Signal2D with 2 navigation dimensions
    rng = np.random.default_rng(0)
    data = np.ones((50, 100, 100))
    s = hs.signals.Signal2D(data)

    for axis in s.axes_manager.signal_axes:
        axis.scale = 2*np.pi / 100








.. GENERATED FROM PYTHON SOURCE LINES 21-26

Dynamic Arrow Markers: Changing Length
######################################

The first example shows how to change the length of the arrows when changing
the navigation coordinates

.. GENERATED FROM PYTHON SOURCE LINES 27-51

.. code-block:: Python


    X, Y = np.meshgrid(np.arange(0, 2 * np.pi, .2), np.arange(0, 2 * np.pi, .2))
    offsets = np.column_stack((X.ravel(), Y.ravel()))

    weight = np.cos(np.linspace(0, 4*np.pi, num=50))

    U = np.empty(s.axes_manager.navigation_shape, dtype=object)
    V = np.empty(s.axes_manager.navigation_shape, dtype=object)
    C = np.empty(s.axes_manager.navigation_shape, dtype=object)
    for ind in np.ndindex(U.shape):
        U[ind] = np.cos(X).ravel() / 7.5 * weight[ind]
        V[ind] = np.sin(Y).ravel() / 7.5 * weight[ind]
        C[ind] = np.hypot(U[ind], V[ind])

    m = hs.plot.markers.Arrows(
        offsets,
        U,
        V,
        C=C
        )

    s.plot()
    s.add_marker(m)




.. rst-class:: sphx-glr-horizontal


    *

      .. image-sg:: /auto_examples/Markers/images/sphx_glr_arrows_navigation_001.png
         :alt: arrows navigation
         :srcset: /auto_examples/Markers/images/sphx_glr_arrows_navigation_001.png
         :class: sphx-glr-multi-img

    *

      .. image-sg:: /auto_examples/Markers/images/sphx_glr_arrows_navigation_002.png
         :alt:  Signal
         :srcset: /auto_examples/Markers/images/sphx_glr_arrows_navigation_002.png
         :class: sphx-glr-multi-img





.. GENERATED FROM PYTHON SOURCE LINES 52-57

Dynamic Arrow Markers: Changing Position
########################################

The second example shows how to change the position of the arrows when changing
the navigation coordinates

.. GENERATED FROM PYTHON SOURCE LINES 58-82

.. code-block:: Python


    X, Y = np.meshgrid(np.arange(0, 2 * np.pi, .2), np.arange(0, 2 * np.pi, .2))
    U = np.cos(X).ravel() / 7.5
    V = np.sin(Y).ravel() / 7.5
    C = np.hypot(U, V)

    weight_x = np.sin(np.linspace(0, 2*np.pi, num=50))
    weight_y = np.cos(np.linspace(0, 2*np.pi, num=50))

    offsets = np.empty(s.axes_manager.navigation_shape, dtype=object)
    for ind in np.ndindex(offsets.shape):
        offsets[ind] = np.column_stack((X.ravel() + weight_x[ind], Y.ravel() + weight_y[ind]))

    m = hs.plot.markers.Arrows(
        offsets,
        U,
        V,
        C=C
        )

    s.plot()
    s.add_marker(m)





.. rst-class:: sphx-glr-horizontal


    *

      .. image-sg:: /auto_examples/Markers/images/sphx_glr_arrows_navigation_003.png
         :alt: arrows navigation
         :srcset: /auto_examples/Markers/images/sphx_glr_arrows_navigation_003.png
         :class: sphx-glr-multi-img

    *

      .. image-sg:: /auto_examples/Markers/images/sphx_glr_arrows_navigation_004.png
         :alt:  Signal
         :srcset: /auto_examples/Markers/images/sphx_glr_arrows_navigation_004.png
         :class: sphx-glr-multi-img





.. GENERATED FROM PYTHON SOURCE LINES 83-84

sphinx_gallery_thumbnail_number = 2


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

   **Total running time of the script:** (0 minutes 2.097 seconds)


.. _sphx_glr_download_auto_examples_Markers_arrows_navigation.py:

.. only:: html

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

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

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

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

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


.. only:: html

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

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