Calculate the nth percentile of an array using linear interpolation.
Code
General$sorted = $arr;
sort($sorted);
$index = ($p / 100) * (count($sorted) - 1);
$lower = (int)floor($index);
$fraction = $index - $lower;
$result = $sorted[$lower] + $fraction * (($sorted[$lower + 1] ?? $sorted[$lower]) - $sorted[$lower]);
return $result;Parameters
Array of numbers
Percentile (0-100)
Server
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