title: How to input .cls file in rmarkdown?
body: <p>I would like to use a .cls file when producing pdf file using rmarkdown, how to include this file, where to include it?</p>
  
  <pre><code>---
  title: "Proposal"
  author: "Name Surname"
  date: "01/30/2015"
  output:
    pdf_document:
      fig_caption: yes
      keep_tex: yes
  classoption: a4paper
  ---
  </code></pre>