Clicking on the Top 25 images shows this image is currently top: http://www.tesnexus.com/imageshare/image.php?id=9364
Why? Although a very good image it has inferior ratings against it than pictures below it. Now the only thing I can think of is that pictures rated better but are below it have the odd comment in there with no actual rating, so my question would be is the system seeing non rating comments as a zero ratings? This would explain why some pictures that have had only straight 10's still end up with an average closer to 9.
Full Version: That old image rating chestnut again....
Looking into this now. Found a potential issue and will update once I've investigated further.
Say hello to your new top 25 images.
Found an issue with the database structure not properly supporting the formulae.
In the formulae:
"R" (average rating for the individual image) was rounded to the nearest number rather than to two decimal places. This was due to how the image ratings were stored in the database. The problem is not the same for the file database because ratings are stored to 2DP in the file database.
The ratings now show to 2DP on the image pages and all the ratings have been recounted and updated to take this into account.
Hopefully this now sorts out this issue that has been important for some people. Thank you Floydian for bring up another example; you caught me at a good time as I've just arrived back at my uni house and sat down infront of my main PC for the first time in 10 days!
Found an issue with the database structure not properly supporting the formulae.
In the formulae:
QUOTE
weighted rating (WR) = (v ÷ (v+m)) × R + (m ÷ (v+m)) × C
where:
R = average for the image (mean) = (Rating)
v = number of votes for the image = (votes)
m = minimum votes required to be listed in the Top 25 (currently 5)
C = the mean vote across the whole database (currently 9.26)
where:
R = average for the image (mean) = (Rating)
v = number of votes for the image = (votes)
m = minimum votes required to be listed in the Top 25 (currently 5)
C = the mean vote across the whole database (currently 9.26)
"R" (average rating for the individual image) was rounded to the nearest number rather than to two decimal places. This was due to how the image ratings were stored in the database. The problem is not the same for the file database because ratings are stored to 2DP in the file database.
The ratings now show to 2DP on the image pages and all the ratings have been recounted and updated to take this into account.
Hopefully this now sorts out this issue that has been important for some people. Thank you Floydian for bring up another example; you caught me at a good time as I've just arrived back at my uni house and sat down infront of my main PC for the first time in 10 days!
Thanks 
that 25 looks good. 
that 25 looks good.
Ooooh - fixedyness! Thanks so much, DarkOne - I agree with Floyd, *that's* the way it seems it should be. So turns out your formula works just fine - when it's working. Again, thank you thank you thank you! I appreciate you taking the time to look at it. Now I can go gleefully rate up some of the wonderful artwork hosted on this site. 
Again, thank you thank you thank you! I appreciate you taking the time to look at it. Now I can go gleefully rate up some of the wonderful artwork hosted on this site.
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