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WN6 and Efficiency

WN6 and Efficiency

Postby markb » Thu Feb 14, 2013 1:45 pm

Just a quick question, what is the difference between the two? The reason I'm asking is that since the turn of the year I have started taking my scores seriously due to idiots who believe it is gospel. Since then my daily scores have been in general just scraping in to the good bracket (I know I'm not the greatest player but I also know I am better than my current XVM etc shows). Yesterday I had a nightmare day on the servers, due to a combination of me not playing very well but mainly due to pants on head incompetent teams, as a result of this my efficiency went down by half a point but my WN6 went up half a point. I'm confused!
"The guns have stopped because we are at last about to attack. Even our generals aren't mad enough to shell their own men, they think its far more sporting to let the Germans do it!"

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Re: WN6 and Efficiency

Postby Spack » Thu Feb 14, 2013 5:14 pm

They are both attempts to calculate a rating of how well a player is doing, but both fall short due to a lack of information in the available public player data and also by taking all battles into account including the early ones where most players will still be learning the game.

For the original efficiency rating which was first, I believe, used on Wot-News.de, the calculation is as follows:

Rating = $avgDamage * (1.5 / $avgTankTier + 0.2)
+ $avgFrags * (350 - 20 * $avgTankTier)
+ $avgSpotted * 200
+ 150 * ($avgCapture + $avgDefense);

so $avgDamage, for instance, is the average damage (total damage / number of battles), and $avgTankTier is the average tank tier (average based on battles, not number of tanks).

This the same rating that XVM has used for some time. Last week the rating was changed to this:

Rating = $avgDamage * (10 / ($avgTankTier + 2)) * (0.23 + 2 * $avgTankTier / 100)
+ $avgFrags * 250
+ $avgSpotted * 150
+ (log($avgCapture + 1,1.732)) * 150
+ $avgDefense * 150;

Capture points now have a lower effect on the rating, so players will find their ratings drop if they spent many games capturing bases rather than damaging/killing tanks.

The WN6 rating is an attempt to correlate rating with win rate, and the calculation is as follows:


RatingWN6 = ((1240 - 1040/ pow(min($avgTankTier,6),0.164)) * $avgFrags )
+ ($avgDamage * 530/(184 * pow(M_E, 0.24 * $avgTankTier) + 130))
+ ($avgSpotted * 125)
+ (max($avgDefense,2.2) * 100)
+ (((185 / (0.17 + pow(M_E,($winRate-35) * -0.134))) - 500) * 0.45)
+ ((6 - min($avgTankTier,6)) * -60);

where $winRate = 100 * $wins / $battles (so win rate as a percentage).

You can read more about WN6 (and it's previous incarnations) at http://forum.worldoftanks.com/index.php ... __st__1080 , looks for posts from Praetor77 as he developed the calculation. It's supposed to be less "vulnerable" to players using low tier tanks and spend most of their time capping bases, although the new XVM/WoT-New rating claims the same thing.

It looks like 1stcav.net are still using the old XVM rating (I wrote the code that the 1stcav.net sig uses, the author hasn't released a new version with the new rating calc in yet but I've amended it in mine) as your sig is showing 948 which is the old value.

Don't take them seriously! I have found myself though that aiming to get above 1000 has improved my game - I use WoT Statistics (http://www.saais.co.za/ ) to look at results straight after a battle on my PC, and also WoT Performance Analyzer (http://www.vbaddict.net/wot.php) to get more detailed information on each game. I also used these for the handy tools such as seeing which tanks I have left to kill to get each medal for killing all tanks of a particular country - I've only got 3 German tanks left to kill (E50M, Maus, GW Typ E) and a few US and French tanks for their medals.

Also check out Noobmeter (http://www.noobmeter.com) as this gives you all the rating figures plus it's own, and you can get it to show the ratings for last 7 days, last 1000 battles, and last 30 days once it has enough data which is a better representation of how you are playing. Even my own simple stats page at wot/stats.php shows that your ratings for the past 747 battles (which is how long it's been tracking your data, and will do a better job if you use my signature generator instead of the one at 1stcav.net as mine will track changes daily) are all around 200-300 points higher than your overall ratings.
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Re: WN6 and Efficiency

Postby markb » Thu Feb 14, 2013 5:33 pm

Thanks mate. I know that in general they are just arbitrary numbers, but as I said I got irritated with people calling me noob and moaning about only having a 5% chance of winning as XVM told them so! I have played games that told me we had a 90% chance of winning and we got caned and other games with a 5% chance of winning and we battered the enemy.

I think the problem is that there are all these different ways of calculating these scores and to a point they are all different, it all depends on whoever is writing the code as to what they think are important. I just don't pay attention, I've seen players with XVMs of 450 have blinders ad ones with a score of 1800+ have a mare. It just annoys me. It's the same as win rate, my win rate in my T54 is about 38%, while I have had some really bad games in it I have played games where I've got 2 or 3000 damage and 3 or 4 kills and the team have been useless and we still lost.

One last thing, what is the performance rating on Noobmeter? All my other scores are average but the performance says I'm below average.
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Re: WN6 and Efficiency

Postby Spack » Thu Feb 14, 2013 5:50 pm

The "performance rating" on Noobmeter is a calculation the owner of the site created himself, which adjusts ratings based on the specific tanks used - each tank has it's own adjustments to the overall rating. It's a closed system for which he provides no information on the inner workings so it's not possible to replicate it. I find it a useful site to make sure my own code for the various public ratings are correct though ;)

There are far too many players who use the XVM rating to decide if they should bother playing. For me, I don't use XVM at all - I play the game as best I can, and review my performance afterwards. It's also, as you say, not an indication of who will win, and even the best players have off days or the worst player can have a good day. It probably would be better if XVM quietly removed it, and it's ridiculous estimate of which side will be likely to win, as it does far more damage sometimes than good, especially when a player decides his team is useless and quits, or worse starts killing his own team!
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Re: WN6 and Efficiency

Postby timewizard » Thu Feb 14, 2013 6:18 pm

I agree with you on this Spack. I've seen too may battles where exactly what you describe has occurred. Guys in the pub match look at XVM, curse at the MM, declare that "We're screwed" or something more profane and less profound, and basically give up the battle before it even starts.

Just recently I was having (I thought) a pretty good run, inflicting more damage than my HP, had a win rate over 50%, and survived about 45% of the battles only to see my efficiency rating go down!

I use the site you gave me to see if my gameplay is improving (it is) and the XVM in game I treat in the same way I treat about 75% of the in-game messages, I ignore it.

As for the gamers in pub matches who spend more time trash talking than actually playing, meh!
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Re: WN6 and Efficiency

Postby markb » Thu Feb 14, 2013 9:47 pm

I agree as well, I'm sure Nige won't want to hear this but I've come across a few members of his clan now and pretty much without exception they are trash talking ****holes!

I get really irritated by people who look at XVM and decide that as its told them they've already lost they act like total idiots. In one game I saw a Hummel suicide scout just because XVM told him we couldn't win, we went on to win the game 15 - 6.

The only reason I have XVM is because it was part of a mod package I downloaded and installed and I couldn't be bothered going through the file and messing about extracting all the separate parts.
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Re: WN6 and Efficiency

Postby timewizard » Thu Feb 14, 2013 9:54 pm

If it's the mod I think it is, the one with the range circles and the better gunsight, then I agree that it's a good mod.

But the XVM aspect isn't the greatest.
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Re: WN6 and Efficiency

Postby markb » Thu Feb 14, 2013 10:31 pm

That's the one, its also got the hit direction mod and an upgraded minimap.
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Re: WN6 and Efficiency

Postby timewizard » Fri Feb 15, 2013 12:57 am

Yeah, that's a very good mod to have. Covers a lot of bases!
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Re: WN6 and Efficiency

Postby Spack » Fri Feb 15, 2013 9:35 am

If you run XVM Lite then it removes the ratings, but you get all the rest of the plugins working. You can also edit the XVM config to turn off the ratings if you want, or with the latest version switch it to WN6 instead of the normal rating.

I use the Camera Zoom Mod which I picked up from Curses, just to help with arty as the default zoom is too close. I also have a minimap mod which adds spotting and view range arcs to help with positioning - makes it easier to place myself in useful spots as a TD and not find myself a few metres out of spotting range so tanks can sneak past.
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Re: WN6 and Efficiency

Postby markb » Fri Feb 15, 2013 11:02 am

The mod pack I used came from Curse I think and already has those mods in it. I like the zoom mode as you can zoom right out to look round corners better to make sure I don't drive out right into someone's guns! It also comes with jimbos crosshairs mod which is good as it gives you extra info such as distance to target and a reload timer. The other mod that was in it is a damage summary that tells you how much each hit has done to you as well as how many hits you've scored, how much damage you've done to each target and a total damage for the game.

I'll have to have a look to see if I can adjust the XVM settings.
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Re: WN6 and Efficiency

Postby muni37 » Thu May 08, 2014 3:27 pm

Hi :P :P
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Re: WN6 and Efficiency

Postby berger15 » Thu May 08, 2014 5:30 pm

I don't use any mods - and I think it shows! ;)
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