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

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

.. _sphx_glr_auto_examples_others_plot_logo.py:


=======================
Logo of the POT toolbox
=======================

In this example we plot the logo of the POT toolbox.

This logo is that it is done 100% in Python and generated using
matplotlib and plotting the solution of the EMD solver from POT.

.. GENERATED FROM PYTHON SOURCE LINES 14-21

.. code-block:: Python


    # Author: Remi Flamary <remi.flamary@polytechnique.edu>
    #
    # License: MIT License

    # sphinx_gallery_thumbnail_number = 1








.. GENERATED FROM PYTHON SOURCE LINES 22-26

.. code-block:: Python

    import numpy as np
    import matplotlib.pyplot as pl
    import ot








.. GENERATED FROM PYTHON SOURCE LINES 27-29

Data for logo
-------------

.. GENERATED FROM PYTHON SOURCE LINES 29-65

.. code-block:: Python



    # Letter P
    p1 = np.array([[0, 6.], [0, 5], [0, 4], [0, 3], [0, 2], [0, 1], ])
    p2 = np.array([[1.5, 6], [2, 4], [2, 5], [1.5, 3], [0.5, 2], [.5, 1], ])

    # Letter O
    o1 = np.array([[0, 6.], [-1, 5], [-1.5, 4], [-1.5, 3], [-1, 2], [0, 1], ])
    o2 = np.array([[1, 6.], [2, 5], [2.5, 4], [2.5, 3], [2, 2], [1, 1], ])

    # Scaling and translation for letter O
    o1[:, 0] += 6.4
    o2[:, 0] += 6.4
    o1[:, 0] *= 0.6
    o2[:, 0] *= 0.6

    # Letter T
    t1 = np.array([[-1, 6.], [-1, 5], [0, 4], [0, 3], [0, 2], [0, 1], ])
    t2 = np.array([[1.5, 6.], [1.5, 5], [0.5, 4], [0.5, 3], [0.5, 2], [0.5, 1], ])

    # Translating the T
    t1[:, 0] += 7.1
    t2[:, 0] += 7.1

    # Concatenate all letters
    x1 = np.concatenate((p1, o1, t1), axis=0)
    x2 = np.concatenate((p2, o2, t2), axis=0)

    # Horizontal and vertical scaling
    sx = 1.0
    sy = .5
    x1[:, 0] *= sx
    x1[:, 1] *= sy
    x2[:, 0] *= sx
    x2[:, 1] *= sy








.. GENERATED FROM PYTHON SOURCE LINES 66-68

Plot the logo (clear background)
--------------------------------

.. GENERATED FROM PYTHON SOURCE LINES 68-92

.. code-block:: Python


    # Solve OT problem between the points
    M = ot.dist(x1, x2, metric='euclidean')
    T = ot.emd([], [], M)

    pl.figure(1, (3.5, 1.1))
    pl.clf()
    # plot the OT plan
    for i in range(M.shape[0]):
        for j in range(M.shape[1]):
            if T[i, j] > 1e-8:
                pl.plot([x1[i, 0], x2[j, 0]], [x1[i, 1], x2[j, 1]], color='k', alpha=0.6, linewidth=3, zorder=1)
    # plot the samples
    pl.plot(x1[:, 0], x1[:, 1], 'o', markerfacecolor='C3', markeredgecolor='k')
    pl.plot(x2[:, 0], x2[:, 1], 'o', markerfacecolor='b', markeredgecolor='k')


    pl.axis('equal')
    pl.axis('off')

    # Save logo file
    # pl.savefig('logo.svg', dpi=150, transparent=True, bbox_inches='tight')
    # pl.savefig('logo.png', dpi=150, transparent=True, bbox_inches='tight')




.. image-sg:: /auto_examples/others/images/sphx_glr_plot_logo_001.png
   :alt: plot logo
   :srcset: /auto_examples/others/images/sphx_glr_plot_logo_001.png
   :class: sphx-glr-single-img


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

 .. code-block:: none


    (-0.43, 9.03, 0.375, 3.125)



.. GENERATED FROM PYTHON SOURCE LINES 93-95

Plot the logo (dark background)
--------------------------------

.. GENERATED FROM PYTHON SOURCE LINES 95-113

.. code-block:: Python


    pl.figure(2, (3.5, 1.1), facecolor='darkgray')
    pl.clf()
    # plot the OT plan
    for i in range(M.shape[0]):
        for j in range(M.shape[1]):
            if T[i, j] > 1e-8:
                pl.plot([x1[i, 0], x2[j, 0]], [x1[i, 1], x2[j, 1]], color='w', alpha=0.8, linewidth=3, zorder=1)
    # plot the samples
    pl.plot(x1[:, 0], x1[:, 1], 'o', markerfacecolor='w', markeredgecolor='w')
    pl.plot(x2[:, 0], x2[:, 1], 'o', markerfacecolor='w', markeredgecolor='w')

    pl.axis('equal')
    pl.axis('off')

    # Save logo file
    # pl.savefig('logo_dark.svg', dpi=150, transparent=True, bbox_inches='tight')
    # pl.savefig('logo_dark.png', dpi=150, transparent=True, bbox_inches='tight')



.. image-sg:: /auto_examples/others/images/sphx_glr_plot_logo_002.png
   :alt: plot logo
   :srcset: /auto_examples/others/images/sphx_glr_plot_logo_002.png
   :class: sphx-glr-single-img


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

 .. code-block:: none


    (-0.43, 9.03, 0.375, 3.125)




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

   **Total running time of the script:** (0 minutes 0.058 seconds)


.. _sphx_glr_download_auto_examples_others_plot_logo.py:

.. only:: html

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

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

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

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

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


.. only:: html

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

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