title: how to replace numbers on X axis by dates when using plot in R?
body: <p>I would like to present the x lab as date not numbers.
  if you,for instance , plot:</p>
  
  <pre><code> f=c(2,1,5,4,8,9,5,2,1,4,7)
   plot(f)
  </code></pre>
  
  <p>you would get on the x axis numbers range according to how many values we have.
  How can I set for example my first value as 04/01/2012 and  the second value to be 05/01/2012 and so on and then present them on x axis as date not numbers!!</p>
  
  <p>I do not have date in my data but I know the first date.</p>
  
  <p>Thanks in advance </p>