title: drawing duplicated points in gnuplot with small margin
body: <p>I'm wondering if there is a way to draw duplicated points in gnuplot without letting them be invisible, putting the point to (X+rand(-0.5;0.5),Y+rand(-0.5;0.5)). So the dot is not placed at X/Y of the previous point but - depending on randomize - a little bit up, down, left or right. Then no dot becomes invisible. </p>
  
  <p>This effect is called "jitter". This is a good example: <a href="http://www.ats.ucla.edu/stat/spss/faq/jitter.htm" rel="nofollow">http://www.ats.ucla.edu/stat/spss/faq/jitter.htm</a></p>