title: Generate a repeating sequence based on vector
body: <p>I am trying to take an existing vector and repeat each element of it six times.  I feel like this should be easy using <code>rep()</code> but I keep hitting the wall.
  Basically I would like to take this vector:</p>
  
  <pre><code>1027 1028 1030 1032 1037
  </code></pre>
  
  <p>And turn it into this:</p>
  
  <pre><code>1027 1027 1027 1027 1027 1027 1028 1028 1028 1028 1028 1028 ...
  </code></pre>