title: How to add documentation to a data.frame in R?
body: <p>I've been using R for a while and I've realized it would help a lot if you could attach a description data contained in the data.frame, because you could gather all useful research information in a .Rdata file.</p>
  
  <p>I want to add to my dataframe info like the one is displayed by ?iris (describing the data in the iris dataframe)</p>
  
  <p>However I cannot find a way to do this.</p>