title: Difference between c() and append()
body: <p>What is the difference between using <code>c()</code> and <code>append()</code>? Is there any?</p>
  
  <pre><code>&gt; c(      rep(0,5), rep(3,2) )
  [1] 0 0 0 0 0 3 3
  
  &gt; append( rep(0,5), rep(3,2) )
  [1] 0 0 0 0 0 3 3
  </code></pre>