On Thu, 30 Jun 2005, ken doo wrote:
I know this issue is treated before, but I wan to make sure that I
understand it correctly.
We use Analog to extract the IP's and use this figure as 'uniques'. As more
users can be behind 1 IP address, this is not a valid way to measure
uniques. But there are also users that use different IP's. The best way is
to use cookies, but that also does not measure 100% guaranteed uniques as
people can clear their cache/kill their cookies.
I read somewhere that a good way to get better/more correct result is to use
the combination of IP and User Agent.
Does Analog have a parameter to extract the 'uniques' based on this
combination?
Cookies is the best way. If you have cookies in your logfile and define the
cookie as a "user", analog will measure the number of users.
There is no way to make analog use IP+UA. But that way is usually less
accurate, because you get lots of people from one ISP using the same IP
address and the same user agent (a recent IE, say).
As you noted, every method has problems. There really isn't a good way to
count the number of visitors accurately. See docs/webworks.html.
--
Stephen Turner, Cambridge, UK http://homepage.ntlworld.com/adelie/stephen/
"Low Priced Cambridge Clare College. Big selection at eBay UK!"
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