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#!/usr/bin/perl
use strict;
use warnings;
package Metts;
sub energy
{
my ($beta,$betaLabel,$option,$fin) = @_;
defined($fin) or die "Metts::energy beta label option fin\n";
my $minSite = 1;
my $minMeas = 0;
my $counter = 0;
my $sum = 0;
my $sum2 = 0;
my $meas =0;
my $site = -1;
my $flag=0;
while (<$fin>) {
if (/sites=([^\+])\+([^\+])/) {
my $site1 = $1;
my $site2 = $2;
$site = $site1;
$site-- if ($site1>$site2);
$meas++ if ($site==$minSite);
}
if (/Hamiltonian average at $betaLabel\=([^ ]+) for target\=0 /) {
next unless ($1==$beta);
next unless ($meas>$minMeas);
next unless ($site==$minSite);
if (/\<phi\(t\)\|H\|phi\(t\)>=([^ ]+) /) {
my $energy = $1;
my ($re,$im) = complexCtor($energy);
die "$0: $energy is not real\n" unless (abs($im)<1e-6);
$sum2 += $re;
$flag=1;
}
}
if (/Hamiltonian average at $betaLabel\=([^ ]+) for target\=1 /) {
next unless ($flag);
$flag=0;
$sum += $sum2;
print "$counter $sum2 $site\n" if ($option);
$sum2=0;
$counter++;
}
}
die "$0: counter==0\n" if ($counter==0);
$sum /= ($counter);
return ($sum, $counter);
}
sub density
{
my ($beta,$label,$option,$fin)=@_;
defined($fin) or die "Metts::density: beta label option fin\n";
#print STDERR "$beta $label $option\n";
my $minSite = 1000;
my $maxSite = 0;
my @value;
my @value2;
my @counter;
while(<$fin>) {
next unless (/\Q$label/);
my @temp=split;
(scalar(@temp) > 2) or next;
my $site = $temp[0];
my $val = $temp[1];
my $t = $temp[2];
next unless ($t == $beta);
if (!defined($counter[$site])) {
$counter[$site]=0;
} else {
$counter[$site]++;
}
$value[$site][$counter[$site]]=$val;
$minSite = $site if ($site<$minSite);
$maxSite = $site if ($site>$maxSite);
}
my $total = $counter[1];
my ($denominator,$average)=(0,0);
defined($total) or die "$0: No data found\n";
for (my $i=0;$i<$total;$i++) {
my $sum = 0;
my $exitHere = 0;
for (my $site=$minSite;$site<=$maxSite;$site++) {
$_ = $value[$site][$i];
if (!defined($_)) {
$exitHere=1;
last;
}
$sum += $_;
}
last if ($exitHere);
print "$i $sum " if ($option);
$average += $sum;
$denominator++;
for (my $site=$minSite;$site<=$maxSite;$site++) {
$_ = $value[$site][$i];
$_ = 0 if (!defined($_));
print "$_ " if ($option);
}
print "\n" if ($option);
}
($denominator>0) or die "$0: No data found yet\n";
$average /= $denominator;
return ($average, $total);
}
sub load
{
my ($file) = @_;
my %h;
open(FILE, "$file") or return %h;
while (<FILE>) {
# label= values
next unless (/=/);
my @temp = split(/=/);
(scalar(@temp) == 2) or next;
my $label = $temp[0];
$_ = $temp[1];
my @values = split;
$h{"$label"} = \@values;
}
close(FILE);
return %h;
}
sub complexCtor
{
my ($x) = @_;
if ($x=~/\(([^,]+),([^\)]+)\)/) {
return ($1,$2);
}
die "$0: $x is not numeric\n" unless ($x=~/^[0-9e\-\+\.]+$/);
return ($x,0);
}
1;
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