The  save command saves user-defined functions, variables, set
 options or all three plus the last  plot ( splot) command to the
 specified file.

 Syntax:
         save  {} ""

 where  is  functions,  variables or  set. If no option is
 used, GNUPLOT saves functions, variables, set options and the last  plot
 ( splot) command.

  saved files are written in text format and may be read by the  load
 command.

 The filename must be enclosed in quotes.

 Examples:

         save "work.gnu"
         save functions 'func.dat'
         save var 'var.dat'
         save set "options.dat"