6 use CGI::Carp qw(fatalsToBrowser);
11 my $dbh = foosball::db_connect();
12 $dbh->{AutoCommit} = 0;
14 my $q = $dbh->prepare('select *,extract(epoch from gametime) as eptime from single_results order by gametime');
16 my $games = $q->fetchall_arrayref({});
20 if (defined($ARGV[0])) {
23 my ($rd, $c) = split /,/, $arg;
24 push @parms, [ $rd, $c ];
27 @parms = ([ $foosball::initial_rd, $foosball::c ]);
30 for my $parm (@parms) {
31 $foosball::initial_rd = $parm->[0];
32 $foosball::c = $parm->[1];
34 $dbh->do('delete from single_rating') unless $dryrun;
38 # Combined log-likelihood
41 for my $ref (@$games) {
42 for my $user (($ref->{'username1'}, $ref->{'username2'})) {
43 if (!exists($ratings{$user})) {
44 $ratings{$user} = [ $foosball::initial_rating, $foosball::initial_rd, 0 ];
48 my $rating1 = $ratings{$ref->{'username1'}}->[0];
49 my $rd1 = $ratings{$ref->{'username1'}}->[1];
50 my $age1 = $ref->{'eptime'} - $ratings{$ref->{'username1'}}->[2];
52 my $rating2 = $ratings{$ref->{'username2'}}->[0];
53 my $rd2 = $ratings{$ref->{'username2'}}->[1];
54 my $age2 = $ref->{'eptime'} - $ratings{$ref->{'username2'}}->[2];
56 my $score1 = $ref->{'score1'};
57 my $score2 = $ref->{'score2'};
59 $rd1 = foosball::apply_aging($rd1, $age1 / 86400.0);
60 $rd2 = foosball::apply_aging($rd2, $age2 / 86400.0);
62 my ($newr1, $newrd1, $likelihood) = foosrank::compute_new_rating($rating1, $rd1, $rating2, $rd2, $score1, $score2);
63 my ($newr2, $newrd2) = foosrank::compute_new_rating($rating2, $rd2, $rating1, $rd1, $score2, $score1);
65 $cll += log($likelihood);
68 printf("%-10s - %-10s: %u - %u, new ratings %u/%u %u/%u [$likelihood]\n",
69 $ref->{'username1'}, $ref->{'username2'}, $ref->{'score1'},
70 $ref->{'score2'}, $newr1, $newrd1, $newr2, $newrd2);
71 $dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
72 $ref->{'username1'}, $ref->{'gametime'}, $newr1, $newrd1, $newr1-$rating1);
73 $dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
74 $ref->{'username2'}, $ref->{'gametime'}, $newr2, $newrd2, $newr2-$rating2);
77 $ratings{$ref->{'username1'}} = [ $newr1, $newrd1, $ref->{'eptime'} ];
78 $ratings{$ref->{'username2'}} = [ $newr2, $newrd2, $ref->{'eptime'} ];
81 $dbh->commit unless $dryrun;
84 printf "%f %f %f\n", $parm->[0], $parm->[1], -$cll;
86 printf "\nCombined negative log-likelihood (smaller value means a better model): %f\n",