#!/usr/bin/perl
#
# Plot sensitivity curve for LIGO Hanford, O3, taken from
#     https://dcc.ligo.org/LIGO-T1500293/public
#
  

  $output_file = "./ligo_o3h1_sensitivity.ps";
  $term_options = "postscript color enhanced 'Helvetica,18' size 13,10";

  $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";

  #  revert to some oldish default colors 
  printf CMDFILE "set style line 1 lt rgb 'red' lw 3  \n"; 
  printf CMDFILE "set style line 2 lt rgb 'sea-green' lw 3  \n"; 
  printf CMDFILE "set style line 3 lt rgb 'blue' lw 3  \n"; 
  printf CMDFILE "set style line 4 lt rgb 'cyan' lw 3  \n"; 
  printf CMDFILE "set style line 5 lt rgb 'violet' lw 3  \n"; 




  printf CMDFILE "set logscale x \n";
  printf CMDFILE "set logscale y \n";
  printf CMDFILE "set grid \n";
  printf CMDFILE "unset key \n";
  printf CMDFILE "set xlabel 'Frequency (Hz) ' \n";
  printf CMDFILE "set ylabel 'Strain noise ' \n";
  printf CMDFILE "set title 'LIGO O3 Hanford sensitivity curve ' \n";
  
  $cmd = "plot [][] 'o3_h1.txt' using 1:2 ";
  $cmd .= "       with lines ls 1 t '' ";

  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`;
  }

