title: i want to find and delete rows that contain certain data in r language?
body: <p>a-      b-        c-          d<br>
  1-     Aman-     cake-       red<br>
  2-Manish-cookie-blue<br>
  3-Anish-cola-black<br>
  a-b-c-d<br>
  4-Pankaj-kite-green<br>
  5-Anuj-jet-brown<br>
  a-b-c-d<br>
  6-Ami-goat-white</p>
  
  <p>This all data is in single data.frame. I want to find the location of the values (a   b   c   d) other than the header, and ten i want to delete those values from the data.frame.</p>