Add a script to train the model.

diff --git a/train.pl b/train.pl
new file mode 100755 (executable)
index 0000000..4981e44
--- /dev/null
+++ b/train.pl
@@ -0,0 +1,65 @@
+#! /usr/bin/perl
+use DBI;
+use strict;
+use warnings;
+no warnings qw(once);
+use POSIX;
+require './config.pm';
+
+my $dbh = DBI->connect($config::local_connstr, $config::local_username, $config::local_password)
+       or die "connect: " . $DBI::errstr;
+$dbh->{AutoCommit} = 0;
+$dbh->{RaiseError} = 1;
+
+# Find last completely done season 
+my $ref = $dbh->selectrow_hashref('SELECT sesong FROM fotballserier GROUP BY sesong HAVING COUNT(*)=COUNT(avgjort=1 OR NULL) ORDER BY sesong DESC LIMIT 1');
+my $last_season = $ref->{'sesong'};
+
+my $tmpnam = POSIX::tmpnam();
+open DATA, ">", $tmpnam
+       or die "$tmpnam: $!";
+
+# Fetch name (ID) list
+my $q = $dbh->prepare('SELECT DISTINCT id FROM fotballdeltagere');
+$q->execute();
+my @ids = ();
+while (my $ref = $q->fetchrow_hashref) {
+       my $id = $ref->{'id'};
+       push @ids, $id;
+}
+       
+print DATA scalar @ids, "\n";
+for my $id (@ids) {
+       print DATA $id, "\n";
+}
+
+# Fetch games
+$q = $dbh->prepare('
+SELECT
+  deltager1.id as p1, deltager2.id as p2, maalfor, maalmot, least(pow(2.0, (sesong - ? + 3) / 3.0), 1.0) AS vekt
+FROM
+  Fotballresultater resultater
+  JOIN Fotballdeltagere deltager1 ON resultater.Lagrecno=deltager1.Nr AND resultater.Serie=deltager1.Serie
+  JOIN Fotballdeltagere deltager2 ON resultater.Motstander=deltager2.Nr AND resultater.Serie=deltager2.Serie
+  JOIN Fotballserier serier on resultater.Serie=serier.Nr
+WHERE deltager1.Nr > deltager2.nr
+');
+$q->execute($last_season);
+
+while (my $ref = $q->fetchrow_hashref) {
+       printf DATA "%d %d %d %d %f\n", $ref->{'p1'}, $ref->{'p2'}, $ref->{'maalfor'}, $ref->{'maalmot'}, $ref->{'vekt'};
+}
+
+close DATA;
+
+$dbh->do('DELETE FROM ratings');
+my $iq = $dbh->prepare('INSERT INTO ratings ( id, rating ) VALUES (?, ?)');
+
+open RATINGS, "/home/sesse/dev/bayeswf/bayeswf < $tmpnam |"
+       or die "bayeswf: $!";
+while (<RATINGS>) {
+       /(.*) (.*)/ or next;
+       $iq->execute($2, $1);
+}
+
+$dbh->commit;