title: R Split String By Delimiter in a column
body: <p>I have a file with several lines. For example</p>
  
  <pre><code>A               B       C    
  awer.ttp.net    Code    554
  abcd.ttp.net    Code    747
  asdf.ttp.net    Part    554
  xyz.ttp.net     Part    747
  </code></pre>
  
  <p>I want to use R to split just column A of the table and I want a new column added to the table D, with values awe, abcd, asdf, and xyz.  Would prefer this to be done using dplyr.</p>