6 use CGI::Carp qw(fatalsToBrowser);
13 my $dbh = foosball::db_connect();
14 $dbh->{AutoCommit} = 0;
16 my $q = $dbh->prepare('select *,extract(epoch from gametime) as eptime from single_results order by gametime');
18 my $games = $q->fetchall_arrayref({});
22 if (defined($ARGV[0])) {
25 my ($rd, $c) = split /,/, $arg;
26 push @parms, [ $rd, $c ];
29 @parms = ([ $foosball::initial_rd, $foosball::c ]);
32 for my $parm (@parms) {
33 $foosball::initial_rd = $parm->[0];
34 $foosball::c = $parm->[1];
36 $dbh->do('delete from single_rating') unless $dryrun;
40 # Combined log-likelihood
43 for my $ref (@$games) {
44 for my $user (($ref->{'username1'}, $ref->{'username2'})) {
45 if (!exists($ratings{$user})) {
46 $ratings{$user} = [ $foosball::initial_rating, $foosball::initial_rd, 0 ];
50 my $rating1 = $ratings{$ref->{'username1'}}->[0];
51 my $rd1 = $ratings{$ref->{'username1'}}->[1];
52 my $age1 = $ref->{'eptime'} - $ratings{$ref->{'username1'}}->[2];
54 my $rating2 = $ratings{$ref->{'username2'}}->[0];
55 my $rd2 = $ratings{$ref->{'username2'}}->[1];
56 my $age2 = $ref->{'eptime'} - $ratings{$ref->{'username2'}}->[2];
58 my $score1 = $ref->{'score1'};
59 my $score2 = $ref->{'score2'};
61 $rd1 = foosball::apply_aging($rd1, $age1 / 86400.0);
62 $rd2 = foosball::apply_aging($rd2, $age2 / 86400.0);
64 my ($newr1, $newrd1, $likelihood) = foosrank::compute_new_rating($rating1, $rd1, $rating2, $rd2, $score1, $score2);
65 my ($newr2, $newrd2) = foosrank::compute_new_rating($rating2, $rd2, $rating1, $rd1, $score2, $score1);
67 $cll += log($likelihood);
70 printf("%-10s - %-10s: %u - %u, new ratings %u/%u %u/%u [$likelihood]\n",
71 $ref->{'username1'}, $ref->{'username2'}, $ref->{'score1'},
72 $ref->{'score2'}, $newr1, $newrd1, $newr2, $newrd2);
73 $dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
74 $ref->{'username1'}, $ref->{'gametime'}, $newr1, $newrd1, $newr1-$rating1);
75 $dbh->do('insert into single_rating values (?,?,?,?,?)', undef,
76 $ref->{'username2'}, $ref->{'gametime'}, $newr2, $newrd2, $newr2-$rating2);
79 $ratings{$ref->{'username1'}} = [ $newr1, $newrd1, $ref->{'eptime'} ];
80 $ratings{$ref->{'username2'}} = [ $newr2, $newrd2, $ref->{'eptime'} ];
83 $dbh->commit unless $dryrun;
86 printf "%f %f %f\n", $parm->[0], $parm->[1], -$cll;
88 printf "\nCombined negative log-likelihood (smaller value means a better model): %f\n",