title: How can I plot a 1-D plot in R?
body: <p>I have a vector of integers, e.g.: <code>2,8,11,19</code>.</p>
  
  <p>I would like to plot a line of length e.g. 20 then plot a dot for each value that exist in the list (at some constant height), so I get something like this:</p>
  
  <p><code>-+-----+--+-------+-</code></p>