stats_dens_weibull
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
?>
stats_harmonic_mean
(PECL stats:1.0.0-1.0.2)
stats_harmonic_mean — 値の配列の調和平均を返す
パラメータ
- a
-
返り値
add a note
User Contributed Notesstats_harmonic_mean
Daniel Morris (www.danielxmorris.com)
15-Aug-2008 07:51
15-Aug-2008 07:51