If I am reading Wikipeadia correctly, you want this:
<?php
function stats_harmonic_mean($array){
$count = count($array);
$mean = 0;
foreach($array as $n){
$mean += 1/$n;
}
$mean = $count / $mean;
return $mean;
}
?>
No guarantees as to correctness.
The *real* function probably takes a variable number of arguments, and
you can do that if you need to, but you're on your own for that.
On Fri, December 14, 2007 8:38 am, LKSunny wrote:
> i know it can make simple function, if have Statistics knowledge...
>
> reference:
> http://en.wikipedia.org/wiki/Harmonic_Mean
>
> "Jochem Maas" <jochem@xxxxxxxxxxxxx>
> ???????:47628FED.3080701@xxxxxxxxxxxxxxxx
>> LKSunny wrote:
>>> i know stats_harmonic_mean(), but i am not server admin, i can't
>>> install
>>> PECL, so i need make it by manual, but i have't Statistics
>>> knowledge, any
>>> one can help me ? thank you very much !!
>>
>> I doubt anyone is going to write a php version of that function for
>> you.
>>
>> given that you are not the server admin then someone else must be,
>> go to
>> that person and ask them to run the relevant pecl command:
>>
>> pecl install stats
>>
>> if they won't get another hoster. regardless you can still develop
>> with
>> that extension
>> on your local machine.
>>
>> If you really need such a function/extension then you should be
>> able to convince the client that it's less effort to find suitable
>> hosting
>> than it
>> is to waste time reinventing a, potentially complex, wheel.
>>
>>>
>
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Know what I want?
I want you to buy a CD from some indie artist.
http://cdbaby.com/from/lynch
Yeah, I get a buck. So?
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