.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/transforms/00.cartesian.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_gallery_transforms_00.cartesian.py>`
        to download the full example code

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

.. _sphx_glr_gallery_transforms_00.cartesian.py:


=====================
Cartesian coordinates
=====================

In mpltern, the x- and y-limits are initially
[−3\ :sup:`−1/2`, +3\ :sup:`−1/2`] and [0, 1], respectively.
The triangle vertices are, by default,
(0, 1), (−3\ :sup:`−1/2`, 0), (+3\ :sup:`−1/2`, 0).

In most methods, we can still plot in Cartesian coordinates rather than in
ternary coordinates by using `Matplotlib transforms
<https://matplotlib.org/stable/tutorials/advanced/transforms_tutorial.html>`__
like `ax.transData`, `ax.transAxes`, `fig.transFigure`.

.. GENERATED FROM PYTHON SOURCE LINES 16-38

.. code-block:: Python

    import numpy as np
    import matplotlib.pyplot as plt
    import mpltern


    def plot_frame(ax):
        """Plot frame of the original Axes."""
        ax.fill(
            [0, 0, 1, 1],
            [0, 1, 1, 0],
            ec="k",
            fc="none",
            ls=":",
            clip_on=False,
            transform=ax.transAxes,
        )


    ax = plt.subplot(projection='ternary')
    plot_frame(ax)





.. image-sg:: /gallery/transforms/images/sphx_glr_00.cartesian_001.svg
   :alt: 00.cartesian
   :srcset: /gallery/transforms/images/sphx_glr_00.cartesian_001.svg
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 39-41

This may be useful to plot e.g. the subfigure label as well as to understand
the legend position.

.. GENERATED FROM PYTHON SOURCE LINES 41-62

.. code-block:: Python

    fig = plt.figure(figsize=(10.8, 4.8))
    fig.subplots_adjust(wspace=0.3)

    ax = fig.add_subplot(1, 2, 1, projection='ternary')
    plot_frame(ax)
    x = [-1.0 / np.sqrt(3.0), +0.5 / np.sqrt(3.0)]
    y = [0.0, 0.5]
    ax.plot(x, y, label="a", transform=ax.transData)
    ax.legend(loc=1)
    ax.text(0.02, 0.94, "(a)", ha="left", transform=ax.transAxes)

    ax = fig.add_subplot(1, 2, 2, projection='ternary')
    plot_frame(ax)
    x = [+1.0 / np.sqrt(3.0), -0.5 / np.sqrt(3.0)]
    y = [0.0, 0.5]
    ax.plot(x, y, label="b", transform=ax.transData)
    ax.legend(loc=2)
    ax.text(0.98, 0.94, "(b)", ha="right", transform=ax.transAxes)

    plt.show()




.. image-sg:: /gallery/transforms/images/sphx_glr_00.cartesian_002.svg
   :alt: 00.cartesian
   :srcset: /gallery/transforms/images/sphx_glr_00.cartesian_002.svg
   :class: sphx-glr-single-img






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

   **Total running time of the script:** (0 minutes 1.889 seconds)


.. _sphx_glr_download_gallery_transforms_00.cartesian.py:

.. only:: html

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

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

      :download:`Download Jupyter notebook: 00.cartesian.ipynb <00.cartesian.ipynb>`

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

      :download:`Download Python source code: 00.cartesian.py <00.cartesian.py>`


.. only:: html

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

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