note 62010 deleted from ref.math by cmb
| From: | cmb@php.net | Date: | Sun, 21 Jul 2019 08:59:30 +0000 |
| Subject: | note 62010 deleted from ref.math by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-211660@lists.php.net to get a copy of this message | ||
Note Submitter: jos at gtacrime dot nl
----
Thanks to Chronial "at" cyberpunkuniverse.de, I was able to create the binompdf(n, p, k)
function.
<?php
function nCr($n, $k){
if ($k > $n)
return NaN;
if (($n - $k) < $k)
return nCr($n, ($n - $k));
$return = 1;
for ($i=0; $i<$k; $i++){
$return *= ($n - $i) / ($i + 1);
}
return $return;
}
function binompdf($n, $p, $k){
$return = nCr($n, $k) * pow($p, $k) * pow((1 - $p), ($n - $k));
return $return;
}
?>