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

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_examples_xmpl_ternary_samples.py>`
        to download the full example code. or to run this example in your browser via Binder

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

.. _sphx_glr_examples_xmpl_ternary_samples.py:


====================================================
Scatter plot of ternary problem in the simplex space
====================================================

This example illustrates how to draw samples from the scores of a model and
their true label.

.. GENERATED FROM PYTHON SOURCE LINES 9-14

.. code-block:: Python

    # Author: Miquel Perello Nieto <miquel.perellonieto@bristol.ac.uk>
    # License: new BSD

    print(__doc__)








.. GENERATED FROM PYTHON SOURCE LINES 15-18

We generate 3 scores as comming from 3 Dirichlet distributions simulating the
output scores of a classifier. Then we show how to draw the samples in the
simplex space.

.. GENERATED FROM PYTHON SOURCE LINES 18-36

.. code-block:: Python


    import matplotlib.pyplot as plt
    import numpy as np
    np.random.seed(42)

    n_c1 = n_c2 = n_c3 = 300
    p = np.concatenate((np.random.dirichlet([6, 2, 3], n_c1),
                        np.random.dirichlet([5, 12, 5], n_c2),
                        np.random.dirichlet([2, 3, 5], n_c3)
                       ))

    y = np.concatenate((np.zeros(n_c1), np.ones(n_c2), np.ones(n_c3)*2))

    from pycalib.visualisations.ternary import draw_tri_samples

    fig, ax = draw_tri_samples(p, classes=y, alpha=0.6)





.. image-sg:: /examples/images/sphx_glr_xmpl_ternary_samples_001.png
   :alt: xmpl ternary samples
   :srcset: /examples/images/sphx_glr_xmpl_ternary_samples_001.png
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 37-38

Here we specify the names of each class and change their colors.

.. GENERATED FROM PYTHON SOURCE LINES 38-42

.. code-block:: Python


    fig, ax = draw_tri_samples(p, classes=y, alpha=0.6,
                               labels=['dogs', 'cats', 'fox'],
                               color_list=['saddlebrown', 'black', 'darkorange'])



.. image-sg:: /examples/images/sphx_glr_xmpl_ternary_samples_002.png
   :alt: xmpl ternary samples
   :srcset: /examples/images/sphx_glr_xmpl_ternary_samples_002.png
   :class: sphx-glr-single-img






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

   **Total running time of the script:** (0 minutes 0.749 seconds)


.. _sphx_glr_download_examples_xmpl_ternary_samples.py:

.. only:: html

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

    .. container:: binder-badge

      .. image:: images/binder_badge_logo.svg
        :target: https://mybinder.org/v2/gh/perellonieto/pycalib/gh-pages?filepath=notebooks/examples/xmpl_ternary_samples.ipynb
        :alt: Launch binder
        :width: 150 px

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

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

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

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


.. only:: html

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

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