I've played this game called League of Legends for a while now, and one thing that I've always been interested in is a measure of your contribution. Of course there are a wide variety of factors that are nearly impossible to account for in a numerical model (other than your MMR after a large number of games). However, I feel like we can obtain a fairly accurate model of your performance, given just your KDA score and the team's total KDA score.
Note that this is NOT a simple calculation of your KDA = (K + A) / D. Additionally, this metric is NOT a perfectly accurate measure of your performance, but rather what I believe to be a fairly accurate estimate of your performance.
It's a very simple method, and the simplicity makes it relatively champion-agnostic and role-agnostic, which is to say, the metric is pretty consistent regardless of the champion/role you play.
You can use my web app to compute your own:
https://lol-metrics.herokuapp.com
Here are instructions on how to use it:
http://www.reddit.com/r/leagueoflegends/comments/2ouqex/how_much_do_you_contribute_to_your_team/
Here is a more detailed post about what it does:
http://www.reddit.com/r/leagueoflegends/comments/2oofd4/a_good_metric_for_measuring_ingame_performance/
Here are some results from my initial trial run:
http://www.reddit.com/r/leagueoflegends/comments/2otq9v/are_you_being_held_back_by_your_teammates_find/
Give it a shot and let me know what you think!
