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faulker/sequence-analyzing.php

Last active December 18, 2015 05:29
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Revisions

  1. faulker revised this gist Nov 24, 2015. No changes.
  2. faulker created this gist Jun 7, 2013.
    50 changes: 50 additions & 0 deletions sequence-analyzing.php
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,50 @@
    function get_average($time_array)
    {
    $total = "";
    $last = "";
    $count = count($time_array);
    for($t=0;$t<$count;$t++)
    {
    $time = $time_array[$t];
    if($t == 0)
    {
    $last = $time;
    } else {
    $diff = get_diff($last, $time);
    $last = $time;
    $total += $diff;
    }
    }
    $average = ($total/($count-1));
    return round($average);
    }

    function get_diff($time1, $time2)
    {
    $t1 = strtotime($time1);
    $t2 = strtotime($time2);
    $diff = ($t2 - $t1)/60;
    return $diff;
    }

    function guess_next($date_array)
    {
    $diff_avg = get_average($date_array);
    $last_date = new DateTime(end($date_array));
    $last_date->add(new DateInterval('PT'.$diff_avg.'M'));
    $next = $last_date->format('m/d/Y H:i');
    return $next;
    }

    $date_stamps = array(
    "5/10/2013 9:30",
    "5/11/2013 9:50",
    "5/12/2013 10:20",
    "5/13/2013 10:59",
    "5/14/2013 11:22",
    "5/15/2013 11:51",
    "5/16/2013 12:28",
    "5/17/2013 12:57",
    "5/18/2013 13:13");

    print(guess_next($date_stamps));