*
* =============  Case 4  ===============
*
* All lines beginning with an asterisk followed by at least ONE
* blank is a comment and is ignored.
*
* Text at the top/center of the page and an autoscaled X axis
* has been added.
*
pp
  plotfile PF scale .5 translate 2 2
  files r10 x cd y cl 
  autox 
  text center top ?This is arbitrary text?
  symbols 1 plot
  go