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

    Click :ref:`here <sphx_glr_download_gallery_pyplots_annotation_polar.py>` to download the full example code
.. rst-class:: sphx-glr-example-title

.. _sphx_glr_gallery_pyplots_annotation_polar.py:


================
Annotation Polar
================

This example shows how to create an annotation on a polar graph.

For a complete overview of the annotation capabilities, also see the
:doc:`annotation tutorial</tutorials/text/annotations>`.


.. code-block:: default

    import numpy as np
    import matplotlib.pyplot as plt

    fig = plt.figure()
    ax = fig.add_subplot(111, polar=True)
    r = np.arange(0,1,0.001)
    theta = 2 * 2*np.pi * r
    line, = ax.plot(theta, r, color='#ee8d18', lw=3)

    ind = 800
    thisr, thistheta = r[ind], theta[ind]
    ax.plot([thistheta], [thisr], 'o')
    ax.annotate('a polar annotation',
                xy=(thistheta, thisr),  # theta, radius
                xytext=(0.05, 0.05),    # fraction, fraction
                textcoords='figure fraction',
                arrowprops=dict(facecolor='black', shrink=0.05),
                horizontalalignment='left',
                verticalalignment='bottom',
                )
    plt.show()




.. image:: /gallery/pyplots/images/sphx_glr_annotation_polar_001.png
    :class: sphx-glr-single-img





------------

References
""""""""""

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


.. code-block:: default


    import matplotlib
    matplotlib.projections.polar
    matplotlib.axes.Axes.annotate
    matplotlib.pyplot.annotate




.. rst-class:: sphx-glr-script-out

 Out:

 .. code-block:: none


    <function annotate at 0x7fb11b15f730>




.. _sphx_glr_download_gallery_pyplots_annotation_polar.py:


.. only :: html

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



  .. container:: sphx-glr-download

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



  .. container:: sphx-glr-download

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


.. only:: html

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

    Keywords: matplotlib code example, codex, python plot, pyplot
    `Gallery generated by Sphinx-Gallery
    <https://sphinx-gallery.readthedocs.io>`_