title: What does the "jitter" function do in R?
body: <p>According to the <a href="http://astrostatistics.psu.edu/su07/R/html/base/html/jitter.html" rel="noreferrer">documentation</a>, the explanation for the <code>jitter</code> function is "Add a small amount of noise to a numeric vector."</p>
  
  <p>What does this mean?</p>
  
  <p>Is a random number associated with each number in the vector and added to it?</p>