$value){
if(!empty($value) && !empty($b[$i])){
$div+=($value - $averageA)*($b[$i] - $averageB);
$sumA+=pow(($value-$averageA), 2);
$sumB+=pow(($b[$i]-$averageB), 2);
}
}
return ($div / (sqrt($sumA) * sqrt($sumB)));
}
function r($p,$i,$data){
return average($p,$p) + c($p,$i,$data);
}
function c($p,$i,$data){
$divident=$divisor=0.0;
foreach($data as $q){
if (empty($q[$i]) || $p===$q){
continue;
}
$simPQ=sim($p,$q);
$averageQ=average($q,$p);
$divisor+=abs($simPQ);
$divident+=(($q[$i]-$averageQ)*$simPQ);
}
return ($divident / $divisor);
}
function wrapR($subject, $item, $data){
return r($data[$subject], $item, $data);
}
function average($set, $controlSet){
$average=0.0;
$count=0;
foreach($set as $i=>$value){
if (!empty($value) && !empty($controlSet[$i])){
$average+=$value;
$count+=1;
}
}
return ($average / $count);
}
#$ratings=array(
# "alice"=>array(5, 1, 0, 3, 2),
# "bob"=>array(3, 1, 5, 4, 2),
# "carol"=>array(4, 0, 5, 0, 3),
# "chuck"=>array(1, 4, 0, 0, 2),
# "dave"=>array(0, 4, 3, 0, 1),
# "eve"=>array(5, 4, 5, 4, 3),
# "fran"=>array(4, 0, 0, 0,2),
# "gordon"=>array(3, 4, 0, 5, 1),
# "isaac"=>array(5, 0, 4, 3, 0),
# "ivan"=>array(3, 1, 1, 0, 1)
#);
#echo sim($ratings['alice'],$ratings['ivan']);
#echo "
";
#echo "
";
#echo wrapR('alice', 2, $ratings);
#
#die();
echo "[BETA] prediction";
$date=array(date("Y"),date("n"),date("j"));
#$date=array(2014, 8, 26);
$diffuse=0;
$selectionStart=mktime(0,0,0,$date[1],$date[2],$date[0]);
$selectionEnd=$selectionStart+(60*60*(24+date("I",$selectionStart)));
$rangeSelector=array('time',$selectionStart-$diffuse,$selectionEnd+$diffuse);
$data= $db->selectRange('temp2','*',$rangeSelector);
foreach($data as $record){
$tupel=$record;
}
$data=null;
#var_dump($tupel);
#echo date("H:i:s", $tupel['time']);
$month=date('n', $tupel['time']);
$year=date('Y', $tupel['time']);
$day=date('j', $tupel['time']);
#$div=getdiv('temp');
$div=1;
for($i=1; $i<=$day;$i++){
$selectionStart=mktime(0,0,0,$month,$i,$year);
$selectionEnd=$selectionStart+(60*60*(24+date("I",$selectionStart)));
$rangeSelector=array('time',$selectionStart-$diffuse,$selectionEnd+$diffuse);
$data= $db->selectRange('temp2','*',$rangeSelector);
$sumary[]=prepareData($data,$div,$selectionStart,$selectionEnd);
}
#foreach($sumary as $key=>$daily){
# echo "| Day: ".($key+1)." | ";
# foreach ($daily as $key=>$hour){
# echo "".$key."-".$hour." ";
# }
# echo " |
";
#}
$div=getdiv('temp');
echo "prediction for ".date("d.m.Y");
echo "\n";
echo "| hour | prediction | difference | actual measurement |
|---|
\n";
for ($i=0;$i<25;$i++){
$r=wrapR($day-1,$i,$sumary);
$r=$r/$div;
$r=round($r,2);
$a=$sumary[$day-1][$i+1]/$div;
$a=round($a,2);
echo "| ".$i." | ".$r." | ".round($r-$a,2)." | ".$a." |
\n";
}
echo "
\n";
#for($i=0;$i<=24;$i++){
# $hours[]=$i*60*60;
#}
#var_dump($hours);
#var_dump(array($month,$year,$day));
$runtime=microtime(true)-$start;
echo "Runtime: ".$runtime." s
";
$db->close();
die();