.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "11_demos\python_packages\matplotlib\demo_buttons.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_11_demos_python_packages_matplotlib_demo_buttons.py>`
        to download the full example code.

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

.. _sphx_glr_11_demos_python_packages_matplotlib_demo_buttons.py:

Buttons
==========

.. GENERATED FROM PYTHON SOURCE LINES 5-46



.. image-sg:: /11_demos/python_packages/matplotlib/images/sphx_glr_demo_buttons_001.png
   :alt: demo buttons
   :srcset: /11_demos/python_packages/matplotlib/images/sphx_glr_demo_buttons_001.png
   :class: sphx-glr-single-img





.. code-block:: Python


    import numpy as np
    import matplotlib.pyplot as plt
    from matplotlib.widgets import Button

    freqs = np.arange(2, 20, 3)

    fig, ax = plt.subplots()
    plt.subplots_adjust(bottom=0.2)
    t = np.arange(0.0, 1.0, 0.001)
    s = np.sin(2 * np.pi * freqs[0] * t)
    (l,) = plt.plot(t, s, lw=2)


    class Index:
        ind = 0

        def next(self, event):
            self.ind += 1
            i = self.ind % len(freqs)
            ydata = np.sin(2 * np.pi * freqs[i] * t)
            l.set_ydata(ydata)
            plt.draw()

        def prev(self, event):
            self.ind -= 1
            i = self.ind % len(freqs)
            ydata = np.sin(2 * np.pi * freqs[i] * t)
            l.set_ydata(ydata)
            plt.draw()


    callback = Index()
    axprev = plt.axes([0.7, 0.05, 0.1, 0.075])
    axnext = plt.axes([0.81, 0.05, 0.1, 0.075])
    bnext = Button(axnext, "Next")
    bnext.on_clicked(callback.next)
    bprev = Button(axprev, "Previous")
    bprev.on_clicked(callback.prev)

    plt.show()


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

   **Total running time of the script:** (0 minutes 0.063 seconds)


.. _sphx_glr_download_11_demos_python_packages_matplotlib_demo_buttons.py:

.. only:: html

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

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

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

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

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

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

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