title: Org-mode tables: Exclude columns from export
body: <p>I have a set of tables in org-mode that I am exporting, but I'd like certain columns used for calculations and consumption by code blocks to be excluded from LaTeX export. </p>
  
  <p>I'm sure I saw a way to do this by specifying a range of columns to export below the table, but I can't find reference to it anywhere on the web so there's a good chance I dreamt it. </p>