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

.. only:: html

    .. meta::
        :keywords: codex

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

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

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

.. _sphx_glr_gallery_ticks_tick_labels_from_values.py:


=========================================
Setting tick labels from a list of values
=========================================

Using `.Axes.set_xticks` causes the tick labels to be set on the currently
chosen ticks. However, you may want to allow matplotlib to dynamically
choose the number of ticks and their spacing.

In this case it may be better to determine the tick label from the
value at the tick. The following example shows how to do this.

NB: The `.ticker.MaxNLocator` is used here to ensure that the tick values
take integer values.

.. GENERATED FROM PYTHON SOURCE LINES 17-42

.. code-block:: Python


    import matplotlib.pyplot as plt

    from matplotlib.ticker import MaxNLocator

    fig, ax = plt.subplots()
    xs = range(26)
    ys = range(26)
    labels = list('abcdefghijklmnopqrstuvwxyz')


    def format_fn(tick_val, tick_pos):
        if int(tick_val) in xs:
            return labels[int(tick_val)]
        else:
            return ''


    # A FuncFormatter is created automatically.
    ax.xaxis.set_major_formatter(format_fn)
    ax.xaxis.set_major_locator(MaxNLocator(integer=True))
    ax.plot(xs, ys)
    plt.show()





.. image-sg:: /gallery/ticks/images/sphx_glr_tick_labels_from_values_001.png
   :alt: tick labels from values
   :srcset: /gallery/ticks/images/sphx_glr_tick_labels_from_values_001.png, /gallery/ticks/images/sphx_glr_tick_labels_from_values_001_2_00x.png 2.00x
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 43-53

.. admonition:: References

   The use of the following functions, methods, classes and modules is shown
   in this example:

   - `matplotlib.pyplot.subplots`
   - `matplotlib.axis.Axis.set_major_formatter`
   - `matplotlib.axis.Axis.set_major_locator`
   - `matplotlib.ticker.FuncFormatter`
   - `matplotlib.ticker.MaxNLocator`


.. _sphx_glr_download_gallery_ticks_tick_labels_from_values.py:

.. only:: html

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

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

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

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

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


.. only:: html

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

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