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

.. only:: html

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

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

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

.. _sphx_glr_examples_piechart_matplotlib.py:


================================
Pie chart used Matplotlib logo, with patterns
================================

A bar chart with patterns, pattern colors are set explicitly.

.. GENERATED FROM PYTHON SOURCE LINES 9-79



.. image-sg:: /examples/images/sphx_glr_piechart_matplotlib_001.png
   :alt: piechart matplotlib
   :srcset: /examples/images/sphx_glr_piechart_matplotlib_001.png
   :class: sphx-glr-single-img





.. code-block:: Python

    # pie chart used in matplotlib logo

    # We start with a pie chart that resembles the the one in the matplotlib logo.
    # The only change is their facecolors.


    import numpy as np
    import matplotlib.pyplot as plt
    from matplotlib.patches import Rectangle
    import matplotlib.cm as cm

    fig = plt.figure(1)
    fig.clf()

    ax_position = [0.1, 0.1, 0.8, 0.8]

    lw_bars=0.7
    lw_grid=0.5
    lw_border=1

    rgrid=[1, 3, 5, 7]

    ax = fig.add_axes(ax_position, projection='polar')
    ax.set_axisbelow(True)

    N = 7
    arc = 2. * np.pi
    theta = np.arange(0.0, arc, arc / N)
    radii = np.array([2, 6, 8, 7, 4, 5, 8])
    width = np.pi / 4 * np.array([0.4, 0.4, 0.6, 0.8, 0.2, 0.5, 0.3])
    bars = ax.bar(theta, radii, width=width, bottom=0.0, align='edge',
                  edgecolor='0.3', lw=lw_bars)
    for i, bar in enumerate(bars):
        bar.set_facecolor(f"C{i}")

    ax.tick_params(labelbottom=False, labeltop=False,
                   labelleft=False, labelright=False)

    ax.grid(lw=lw_grid, color='0.9')
    ax.set_rmax(9)
    ax.set_yticks(rgrid)

    # the actual visible background - extends a bit beyond the axis
    ax.add_patch(Rectangle((0, 0), arc, 9.58,
                           facecolor='white', zorder=0,
                           clip_on=False, in_layout=False))


    # We now apply patterns from the pattern_monster.

    import mpl_visual_context.patheffects as pe
    from mpl_pe_pattern_monster import PatternMonster

    pm = PatternMonster()

    # names of patterns. These patterns only accept a single color.
    pattern_names = ["herringbone-2" , "flower-3", "circles-3", "scales-2",
                     "leaves-4", "circles-8", "plus-6"]

    for p, slug in zip(ax.patches, pattern_names):
        pattern_fill = pm.get(slug).fill(ax, color_cycle=[None])
        # None in color_cycle will use facecorlor of the parent artist.
        path_effects = [
            pe.GCModify(alpha=0.3) | pe.FillOnly(),  # We fill the pie with the
                                                     # facecolor with alpha=0.3
            pattern_fill  # Then we fill the area with patterns.
        ]
        p.set_path_effects(path_effects)

    plt.show()


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

   **Total running time of the script:** (0 minutes 0.140 seconds)


.. _sphx_glr_download_examples_piechart_matplotlib.py:

.. only:: html

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

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

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

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

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


.. only:: html

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

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