re relative to.
    If None or empty (the default), file names are relative to the
    directory where the file containing the directive is.

plot_formats
    File formats to generate (default: ['png', 'hires.png', 'pdf']).
    List of tuples or strings::

        [(suffix, dpi), suffix, ...]

    that determine the file format and the DPI. For entries whose
    DPI was omitted, sensible defaults are chosen. When passing from
    the command line through sphinx_build the list should be passed as
    suffix:dpi,suffix:dpi, ...

plot_html_show_formats
    Whether to show links to the files in HTML (default: True).

plot_rcparams
    A dictionary containing any non-standard rcParams that should
    be applied before each plot (default: {}).

plot_apply_rcparams
    By default, rcParams are applied when ``:context:`` option is not used
    in a plot directive.  If set, this configuration option overrides this
    behavior and applies rcParams before each plot.

plot_working_directory
    By default, the working directory will be changed to the directory of
    the example, so the code can get at its data files, if any.  Also its
    path will be added to `sys.path` so it can import any helper modules
    sitting beside it.  This configuration option can be used to specify
    a central directory (also added to `sys.path`) where data files and
    helper modules for all code are located.

plot_template
    Provide a customized template for preparing restructured text.

plot_srcset
    Allow the srcset image option for responsive image resolutions. List of
    strings with the multiplicative factors followed by an "x".
    e.g. ["2.0x", "1.5x"].  "2.0x" will create a png with the default "png"
    resolution from plot_formats, multiplied by 2. If plot_srcset is
    specified, the plot directive uses the
    :doc:`/api/sphinxext_figmpl_directive_api` (instead of the usual figure
    directive) in the intermediary rst file that is generated.
    The plot_srcset option is incompatible with *singlehtml* builds, and an
    error will be raised.

Notes on how it works
---------------------

The plot directive runs the code it is given, either in the source file or the
code under the directive. The figure created (if any) is saved in the sphinx
build directory under a subdirectory named ``plot_directive``.  It then creates
an intermediate rst file that calls a ``.. figure:`` directive (or
``.. figmpl::`` directive if ``plot_srcset`` is being used) and has links to
the ``*.png`` files in the ``plot_directive`` directory.  These translations can
be customized by changing the *plot_template*.  See the source of
:doc:`/api/sphinxext_plot_directive_api` for the templates defined in *TEMPLATE*
and *TEMPLATE_SRCSET*.
é