prepare_data_frame_for_export
=============================

Description
-----------

This function prepares the data frame with calculated quantities for
export

Usage
-----

.. code:: r

   prepare_data_frame_for_export(df_to_plot, global_data, session)

Arguments
---------

-  ``df_to_plot``: data frame
-  ``global_data``: hash table containing variables during session
-  ``session``: shiny session