title: How do I delete rows using row numbers in R?
body: <p>I have a dataframe with 110 rows and two columns. I would like to perform two operations in R:</p>
  
  <ol>
  <li>Delete the first 50 rows from original dataframe.</li>
  <li>Delete next 51-110 rows from original dataframe.</li>
  </ol>
  
  <p>Please help.</p>
  
  <p>Thanks</p>