I did this a couple of seasons ago with a giant text file of my Katarina results. I think that was before the remake, when at the high point I had something like a 70% Katarina win rate and 100 ranked games with her.Saw an interesting post on reddit. I might do this for the new season.
http://www.reddit.com/r/leagueoflegends/comments/2se0iv/keep_track_of_your_solo_queue_progression/