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bayesMass.pl
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Mon, Nov 25, 08:35

bayesMass.pl
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#!/usr/bin/env perl
# Return a meanmass.dat file which contains the mass profile and
# the error bars
#
# syntax : bayesMass.pl <.par>
#
sub mydfits
{
my ($filename, $regexp ) = @_;
my $fh;
open($fh, $filename) or die "ERROR: File $filename not found\n";
$str = "";
while( not $str =~ "END " and not $str =~ $regexp )
{
sysread($fh, $str, 80);
}
close($fh);
return $str;
}
use Getopt::Long;
do "$ENV{'LENSTOOL_DIR'}/perl/covariance.pl";
if( @ARGV < 1 )
{
print "Syntax : bayesMass.pl [-r -xc <xc> -yc <yc>] <.par>\n";
exit 1;
}
# Get options
my ($xc, $yc, $ring);
my $status = GetOptions("xc=f" => \$xc, "yc=f" => \$yc, "r" => \$ring);
# Create the tmp/mass??.fits files
#system("bayesMass $ARGV[0]");
# Get the properties of the fits files
#@fmass=<tmp/mass*.fits>; we cannot use globbing because of Unix glob limit
opendir(DIR,"./tmp") || die "Cannot open ./tmp directory : $!\n";
@fmass = grep { /fits$/ } readdir(DIR);
@fmass = @fmass[0..1000] if( scalar @fmass > 1000);
closedir DIR;
unless( defined $xc && defined $yc )
{
$imsize=mydfits("tmp/$fmass[0]", "NAXIS1");
$imsize=~s/.+=([\s|\w]+)/$1/;
$imsize=$imsize/2+0.5;
$xc = $imsize;
$yc = $imsize;
}
$pixsize=mydfits("tmp/$fmass[0]", "CDELT2");
$pixsize=~s/.+=([\s|\w]+)/$1/;
$pixsize*=3600;
if( $pixsize == 0 )
{
#$pixsize = 4.6875;
$pixsize = 8. / 1.28;
print "WARNING: pixel scale not found in FITS header. Default $pixsize\"/pix\n";
}
open(IN, "para.out") || die "ERROR: para.out file not found\n";
foreach ( <IN> )
{
$scale=$1 if( $_ =~ /Conversion.*==([\s|\d|\.]+)/ );
}
close(IN);
# Check intmass or ringmass
my $intsoft = "intmass";
if ( $ring )
{
print "Use ringmass to compute radial density profile\n";
$intsoft = "ringmass";
}
# Loop over the tmp/mass??.fits files
$nfiles = 0;
my @vm; # vector of all the mass from all the files
foreach $f ( @fmass )
{
$f="tmp/".$f;
printf "Process file %d/%d : %s dm/m:%.2f\r",$nfiles+1,$#fmass+1,$f,$erel;
$f=~s/\.fits$//;
if( ! -e "$f.dat" )
{
# Prepare the intmass script
open(IN, ">mass.int" );
print IN << "EOT";
input
filein $f.fits
xc $xc
yc $yc
eps 0.
theta 0.
pixel $pixsize
scale $scale
end
output
fileout $f.dat
end
fini
EOT
close(IN);
if( system("$intsoft mass 2>1 /dev/null") != 0 )
{
print "ERROR: $intsoft produced error $?\n";
exit 1;
}
}
# Analyse the produced file
open( IN2, "$f.dat") or die "ERROR: cannot open $f.dat\n";
$i=0;
$erel = 0.; # cumulated relative error
while( <IN2> )
{
($ra[$i],$rkpc[$i],$npix[$i],$m) = split(' ');
push @vm, $m;
$avg[$i]+=$m;
$sdev[$i]+=$m*$m;
# cumulated stats
$a = $avg[$i]/($nfiles+1);
$e = sqrt($sdev[$i]/($nfiles+1) - $a*$a);
$erel+= $e*$e/$a/$a if( $a != 0);
$i++;
}
close(IN2);
$ni=$i;
$nfiles++;
}
print "\n";
# Perform the statistics and write the result in meanmass.dat
#my $mmat = pdl( @vm )->reshape($ni, $nfiles);
#my $cov = covariance( $mmat );
open(OUT, ">meanmass.dat");
print OUT "# xc $xc yc $yc $ARGV[0]\n";
for( $i=0; $i<$ni; $i++ )
{
$avg[$i]/=$nfiles;
$sdev[$i] = sqrt($sdev[$i]/$nfiles - $avg[$i]*$avg[$i]);
# $sdev[$i] = sqrt( $cov->slice(",$i")->sum() );
print OUT "$ra[$i] $rkpc[$i] $npix[$i] $avg[$i] $sdev[$i]\n";
}
close OUT;

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