note 85119 added to function.stats-harmonic-mean
| From: | (www.danielxmorris.com) | Date: | Fri, 15 Aug 2008 14:51:18 +0000 |
| Subject: | note 85119 added to function.stats-harmonic-mean | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-143525@lists.php.net to get a copy of this message | ||
I wrote this to calculate harmonic averages in my shares program. Hopefully this can help someone
who doesn't want to use PECL. The function accepts an unlimited number of arguments without
the need to place them into an array, which is better than the way the PECL extension handles the
function.
<?php
/**
* @author Daniel Morris
*/
function harmonic () {
$num_args = func_num_args ();
for ($i = 0; $i < $num_args; $i++) {
$sum += 1 / func_get_arg ($i);
}
return $num_args / $sum;
}
// Tests
echo harmonic (1, 2, 3, 4, 5);
echo harmonic (-1, 3, 4, 10293);
echo harmonic (-1, -2, -3, -4, -5);
// 2.1897810218978
// -9.6022389365052
// -2.1897810218978
?>
----
Server IP: 92.48.74.199
Probable Submitter: 217.154.124.195
----
Manual Page -- http://www.php.net/manual/en/function.stats-harmonic-mean.php
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