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

.. only:: html

    .. meta::
        :keywords: codex

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

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

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

.. _sphx_glr_gallery_text_labels_and_annotations_label_subplots.py:


==================
Labelling subplots
==================

Labelling subplots is relatively straightforward, and varies,
so Matplotlib does not have a general method for doing this.

Simplest is putting the label inside the axes.  Note, here
we use `.pyplot.subplot_mosaic`, and use the subplot labels
as keys for the subplots, which is a nice convenience.  However,
the same method works with `.pyplot.subplots` or keys that are
different than what you want to label the subplot with.

.. GENERATED FROM PYTHON SOURCE LINES 15-32

.. code-block:: Python


    import matplotlib.pyplot as plt

    import matplotlib.transforms as mtransforms

    fig, axs = plt.subplot_mosaic([['a)', 'c)'], ['b)', 'c)'], ['d)', 'd)']],
                                  layout='constrained')

    for label, ax in axs.items():
        # label physical distance in and down:
        trans = mtransforms.ScaledTranslation(10/72, -5/72, fig.dpi_scale_trans)
        ax.text(0.0, 1.0, label, transform=ax.transAxes + trans,
                fontsize='medium', verticalalignment='top', fontfamily='serif',
                bbox=dict(facecolor='0.7', edgecolor='none', pad=3.0))

    plt.show()




.. image-sg:: /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_001.png
   :alt: label subplots
   :srcset: /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_001.png, /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_001_2_00x.png 2.00x
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 33-35

We may prefer the labels outside the axes, but still aligned
with each other, in which case we use a slightly different transform:

.. GENERATED FROM PYTHON SOURCE LINES 35-47

.. code-block:: Python


    fig, axs = plt.subplot_mosaic([['a)', 'c)'], ['b)', 'c)'], ['d)', 'd)']],
                                  layout='constrained')

    for label, ax in axs.items():
        # label physical distance to the left and up:
        trans = mtransforms.ScaledTranslation(-20/72, 7/72, fig.dpi_scale_trans)
        ax.text(0.0, 1.0, label, transform=ax.transAxes + trans,
                fontsize='medium', va='bottom', fontfamily='serif')

    plt.show()




.. image-sg:: /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_002.png
   :alt: label subplots
   :srcset: /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_002.png, /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_002_2_00x.png 2.00x
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 48-50

If we want it aligned with the title, either incorporate in the title or
use the *loc* keyword argument:

.. GENERATED FROM PYTHON SOURCE LINES 50-60

.. code-block:: Python


    fig, axs = plt.subplot_mosaic([['a)', 'c)'], ['b)', 'c)'], ['d)', 'd)']],
                                  layout='constrained')

    for label, ax in axs.items():
        ax.set_title('Normal Title', fontstyle='italic')
        ax.set_title(label, fontfamily='serif', loc='left', fontsize='medium')

    plt.show()




.. image-sg:: /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_003.png
   :alt: a), Normal Title, c), Normal Title, b), Normal Title, d), Normal Title
   :srcset: /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_003.png, /gallery/text_labels_and_annotations/images/sphx_glr_label_subplots_003_2_00x.png 2.00x
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 61-71

.. admonition:: References

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

   - `matplotlib.figure.Figure.subplot_mosaic` /
     `matplotlib.pyplot.subplot_mosaic`
   - `matplotlib.axes.Axes.set_title`
   - `matplotlib.axes.Axes.text`
   - `matplotlib.transforms.ScaledTranslation`


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

   **Total running time of the script:** (0 minutes 1.524 seconds)


.. _sphx_glr_download_gallery_text_labels_and_annotations_label_subplots.py:

.. only:: html

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

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

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

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

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

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: label_subplots.zip <label_subplots.zip>`


.. only:: html

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

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