title: Merging existing PDF files using R
body: <p>I want to merge PDF files that already exist (already saved in my computer) using R. </p>
  
  <p>I already tried to use open source softwares to merge them and it works fine but since I have a couple hundreds of files to merge together, I was hoping to find something a little faster (my goal is to have the file automatically created - or updated, simply by running an R command). </p>
  
  <p>I am used to R so I would like to find a way to create this new multiple-sheet PDF using this program. Is there any function that could do that for me?</p>
  
  <p>Thanks!</p>