title: assign headers based on existing row in dataframe in R
body: <p><strong>After transforming</strong> a dataframe, I would like to assign heads/names to the columns based on an <strong>existing row</strong>. 
  My headers are currently: </p>
  
  <pre><code>row.names   X2  X3  X4  X5  X6  X7  X8  X9  ...
  </code></pre>
  
  <p>I would like to get rid of that and use the following row as column headers (without having to type them out since I have many).</p>
  
  <p>The only solution I have for this is to export and re-load the data (with header=T).</p>