MineRobber9000 / nfl_colley

nfl_colley

Calculates the Colley Matrix rankings of the NFL.

Colley.py is copyright 2014 Eugene Bulkin, licensed under MIT.

Method

For a season of NFL games as returned by Pro-Football-Reference:

1. All tie games are discarded. The Colley Matrix library I'm using has no contingency for tie games.
2. The team abbreviations are normalized. Pro-Football-Reference has an obsession with making sure that team abbreviations are 3 characters long, so we trim the ones that need to be trimmed.
3. The final games.csv is organized as such: Week,Winner abbreviation,Winner score,Loser abbreviation,Loser score,OT
4. The Colley method is ran on these games. Overtime is counted as .75 of a game.
5. The finalized rankings are output.

By default, postseason games are excluded. They can be added by supplying the -p flag to get_game_results.py.

Workflow for NFL season rankings:

Run:

python get_game_results.py
python results_to_games.py
python generate_rankings.py games.csv

The rankings in CSV form are in rankings.csv.