#!/usr/bin/perl
#

  my($output_file, $term_options);

  # get the arguments
  $output_file = "nodes_a.ps";
  $term_options = "postscript color 'Helvetica,18' ";

  $cmdfile = "gnuplot.in";
  
  open (CMDFILE, ">$cmdfile") || die("can't open $cmdfile for writing");
  printf CMDFILE "set output '$output_file' \n";
  printf CMDFILE "set term $term_options \n";
  printf CMDFILE "set grid \n";
  printf CMDFILE "set samples 2000 \n";
  printf CMDFILE "set nokey \n";
  printf CMDFILE "set ylabel '' \n";
  printf CMDFILE "set xlabel '' \n";
#  printf CMDFILE "set title 'Jup field, $filter $aper-pix diff mag, 12-inch, $date UT'\n", $aper;
  
  $cmd = "plot [-10:10][-3:3] 0.5*sin(1.0*x) with lines lw 2 lc -1 ";
  $cmd .= " , ";
  $cmd .= "                   1.0*sin(1.0*x) with lines lw 2 lt 1 lc -1 ";
  $cmd .= " , ";
  $cmd .= "                   1.5*sin(1.0*x) with lines lw 2 lt 1 lc -1 ";
  $cmd .= " , ";
  $cmd .= "                   2.0*sin(1.0*x) with lines lw 2 lt 1 lc -1 ";

  printf CMDFILE "$cmd \n";
  printf CMDFILE "set output \n";
  printf CMDFILE "quit \n";
  close(CMDFILE) ;
  
  $retval = `gnuplot < $cmdfile`;
  printf "retval is ..%s..\n", $retval;
  
  if ($term_options =~ /postscript/) {
    $psfile = $output_file;
    $giffile = $psfile;
    $giffile =~ s/.ps/.png/;
    $cmd = "convert -rotate 90 $psfile $giffile";
    printf "cmd is ..$cmd.. \n";
    $ret = `$cmd`;
  }


exit 0;
