The  set function style command changes the default plotting style
 for functions.

 Syntax:
         set function style
         show function style
         set function style 

 In the first case,  set function style returns the possible style
 choices:   lines,  points,  linespoints,  dots,  steps,
  impulses,  errorbars,  boxes, or  boxerrorbars.
  show function style shows the current default plotting style for
 functions.  set function style linespoints would actually change
 the default plotting style.   See also  plot.