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Improve usetex and pgf troubleshooting docs.#30040

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timhoffm merged 1 commit intomatplotlib:mainfromanntzer:td
May 12, 2025
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2 changes: 2 additions & 0 deletionsdoc/install/dependencies.rst
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Expand Up@@ -422,6 +422,8 @@ Python packages and must be installed separately.
* a LaTeX distribution, e.g. `TeX Live <https://www.tug.org/texlive/>`_ or
`MikTeX <https://miktex.org/>`_

.. _tex-dependencies:

LaTeX dependencies
""""""""""""""""""

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7 changes: 4 additions & 3 deletionsgalleries/users_explain/text/pgf.py
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Expand Up@@ -209,9 +209,10 @@
Troubleshooting
===============

* On Windows, the :envvar:`PATH` environment variable may need to be modified
to include the directories containing the latex, dvipng and ghostscript
executables. See :ref:`environment-variables` and
* Make sure LaTeX is working and on your :envvar:`PATH` (for raster output,
pdftocairo or ghostscript is also required). The :envvar:`PATH` environment
variable may need to be modified (in particular on Windows) to include the
directories containing the executable. See :ref:`environment-variables` and
:ref:`setting-windows-environment-variables` for details.

* Sometimes the font rendering in figures that are saved to png images is
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31 changes: 11 additions & 20 deletionsgalleries/users_explain/text/usetex.py
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Expand Up@@ -124,24 +124,6 @@
produces PostScript without rasterizing text, so it scales properly, can be
edited in Adobe Illustrator, and searched text in pdf documents.

.. _usetex-hangups:

Possible hangups
================

* On Windows, the :envvar:`PATH` environment variable may need to be modified
to include the directories containing the latex, dvipng and ghostscript
executables. See :ref:`environment-variables` and
:ref:`setting-windows-environment-variables` for details.

* Using MiKTeX with Computer Modern fonts, if you get odd \*Agg and PNG
results, go to MiKTeX/Options and update your format files.

* On Ubuntu and Gentoo, the base texlive install does not ship with
the type1cm package. You may need to install some of the extra
packages to get all the goodies that come bundled with other LaTeX
distributions.

.. _usetex-troubleshooting:

Troubleshooting
Expand All@@ -150,8 +132,11 @@
* Try deleting your :file:`.matplotlib/tex.cache` directory. If you don't know
where to find :file:`.matplotlib`, see :ref:`locating-matplotlib-config-dir`.

* Make sure LaTeX, dvipng and Ghostscript are each working and on your
:envvar:`PATH`.
* Make sure LaTeX, dvipng, and Ghostscript are each working and on your
:envvar:`PATH`. The :envvar:`PATH` environment variable may need to
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can you give an example of what this means, particularly for dvipng?

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@anntzeranntzerMay 12, 2025•
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I'll claim this text is at least not worse than the previous one, and that a more detailed description of $PATH (probably something like "shutil.which("foo") returns something else than None) should go to environment_variables_faq.rst, but this can be done as a separate PR.

(Also, the dependency on dvipng may be removed soon, see#30039.)

be modified (in particular on Windows) to include the directories
containing the executables. See :ref:`environment-variables` and
:ref:`setting-windows-environment-variables` for details.

* Make sure what you are trying to do is possible in a LaTeX document,
that your LaTeX syntax is valid and that you are using raw strings
Expand All@@ -161,6 +146,12 @@
option provides lots of flexibility, and lots of ways to cause
problems. Please disable this option before reporting problems.

* Using MiKTeX with Computer Modern fonts, if you get odd \*Agg and PNG
results, go to MiKTeX/Options and update your format files.

* Some required LaTeX packages, such as type1cm, may be missing from minimalist
TeX installs. Required packages are listed at :ref:`tex-dependencies`.

* If you still need help, please see :ref:`reporting-problems`.

.. _dvipng: http://www.nongnu.org/dvipng/
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