<?php
include "config.php";

$sql = "SELECT data.id, time, amount FROM data inner join scans on scans.id=data.scan where place = 'Germany.' order by time asc ";
$stmt = $pdo->query($sql);
$data = $stmt->fetchAll(PDO::FETCH_ASSOC);

var_dump($data[1]['id']);

$oneDaySteps = array();

for ($i = 0; $i < sizeof($data); $i++){
    //var_dump($i%144);
    if (($i+1)%144 == 0){
        var_dump($data[$i]);
        $oneDaySteps[] = intval($data[$i]['amount']);
    }
}

$ratios = array();

for ($i = 1; $i < sizeof($oneDaySteps); $i++){
    $ratios[] = $oneDaySteps[$i]/$oneDaySteps[$i-1];
}

var_dump($ratios);

$sum = 0;
foreach ($ratios as $ratio){
    $sum = $sum + $ratio;
}

echo $sum/count($ratios)."\n";