bigWham wrote:Leehar wrote:bigWham wrote:Leehar wrote:Leehar wrote:bigWham wrote:or, my more general question is... can someone cut through the clutter for me and give me the actual algorithm that is used to calculate clan scores?
http://www.conquerclub.com/forum/viewto ... 0#p3078305
It's a variant of:
Performance rating = [(Total of opponents' ratings + 400 * (Wins - Losses)) / Games].
it is coded in javascript, and has to be converted into php. from what i can see, and i went and looked again, it does not appear to take prior record into account. maybe i am missing something glaringly obvious, and if so need to put on the right track. it is even theoretically possible that the code doesn't implement the intended algorithm. someone that knows the code or algorithm should be able to this pretty quickly.
alternately we can just make something new up.
From what I understand It's taken into account in the total of opponents ratings?
I don't think it'll be feasible to make something new up because it's accepted far & wide, we've seen previously that it can otherwise be a fairly contentious issue getting a ranking otherwise
i am probably missing something. there is a lot of code i was sent, but most of it does not pertain to the actual calculations. here is what i think is the central calculation:
var Delta = Math.round(MinWinGain + 2*(Math.max(Clan1WinFraction,1-Clan1WinFraction) - .5) * (MaxWinGain-MinWinGain));
Delta is the points given for the war
Clan1WinFraction = % of games won in war by Clan 1
MinWinGain = 200 (default)
MaxWinGain = 600 (default)
then these delta are summed over all wars and a weighting applied for how long ago the war was.
Couldn't see anything that took into account the record of your opponent in other wars (in other words some type of measure of how good your opponent was).
Is no one who understands the calculation still around?
Nope
From how it was explained previously, this is what I get for how an opponent clan's rating is included
http://www.conquerclub.com/forum/viewto ... 5#p3082232
The way the program works, it starts at the first challenge, no matter what the Data Window value, and adds challenge by challenge, recomputing each clan's rating as it goes.
In order for this to work, every time I calculate the rating for a clan, I must pass a time parameter. The time parameter specifies what point in time I am calculating the rating. This is the date used to establish the data window that determines which challenges are counted.
Each clan war provides one data point, which is either +/- 400 of the opponent clan's rating at the time of the challenge. For ties, the opponent's rating is used unaltered. Data points are dated to the time of conclusion of the challenge.
For example, when I calculate THOTA's rating for Mar 25, 2007, it will only be looking at challenges that happened prior to that date. If Data Window is set to 1 year, the rating will be computed by games-weighted averaging the data points (i.e. results from challenges) between Mar 25, 2006 and Mar 25, 2007. However, given that one of these THOTA challenges (against Z-Nihilists) concluded on June 6, 2006, the value of that data point would be based on Z-Nihilists rating at that time (June 6, 2006), meaning it would have been computed by averaging data points of the Z-Nihilists' challenges between June 6, 2005 and June 6, 2006. If the Z-Nihilists played against Z-Beelzebubs on July 14, 2005, it would then need to calculate rating of Z-Beelzebubs on July 14, 2005. This required looking at all of Z-Beelzebubs' challenges between July 14, 2004 and July 14, 2005. And so on and so forth until the beginning of time.
I know you don't have much time, but I would suggest flipping through that thread if possible. It has a lot of bits that were discussed as the ranking was being developed, and it can explain the technicalities better than I can second-hand.
One thing I can say however, is that it might not hurt to see what output you can get from utilising that formula. It would help us to be able to identify what we may need to tweak in order to get a result that accurately reflect the F400 where it is currently widely accepted.
Edit:
Ok, I've gained access to the console.
Whats happening with :
var Clan1Score = new Number(Clan1RatingObject.Rating);
var Clan2Score = new Number(Clan2RatingObject.Rating);
and how are they used?
From my understanding, for each clan war, the winner & a loser both get a score out of it. And I'm pretty sure it's not purely based on the 600-200 thing although it's a major factor. Like you though I can't isolate where the Clan 2 score is incorporated.
I'm thinking it may incorporate
( RatingRecords[RatingRecords.length] = new RatingRecord(Clan1Name,Clan2Score,Games,RecordDate,Clan2Name,Outcome1,WinLossOutcome1,Clan2RatingObject.Rating);
RatingRecords[RatingRecords.length] = new RatingRecord(Clan2Name,Clan1Score,Games,RecordDate,Clan1Name,Outcome2,WinLossOutcome2,Clan1RatingObject.Rating);)
?
