Just out of curiosity, wouldnt it be better to use floor($n) instead of round($n-0.5)? On Sun, Jan 30, 2011 at 5:48 AM, Paul Halliday <paul.halliday@xxxxxxxxx>wrote: > On Sat, Jan 29, 2011 at 2:28 PM, Adam Richardson <simpleshot@xxxxxxxxx> > wrote: > > For the nearest rank computation, you could use the following: > > > > $arr = > > > array(12,89,65,23,90,99,9,15,56,67,3,52,78,12,10,88,77,77,77,77,77,77,77); > > sort($arr); > > $score_representing_95th_percentile = $arr[round((95/100) * count($arr) - > > .5)]; > > echo $score_representing_95th_percentile; // 90 > > > > Perfect, exactly what I was looking for. > > thank you. > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Marc Trudel-Bélisle *Chief Technical Officer* www.wizcorp.jp
