KRACH is a Bradley-Terry model, so it's essentially one line of code if you have the BradleyTerry2 library installed. Here's an example for NCAA hockey - I pull the data in from a PostgreSQL database, but you could just as easily pull it in from a CSV file.
https://github.com/octonion/hockey/t...er/uscho_krach
Code:
ability s.e. Quinnipiac 1.687042594 0.4015617 Massachusetts-Lowell 1.480098569 0.4152627 Minnesota 1.428503522 0.3987337 Yale 1.115338226 0.3989082 Miami 1.114307264 0.3874483 Notre Dame 1.109912670 0.3905815 Boston College 1.091836391 0.4111990 St. Cloud State 1.079314965 0.3940719 New Hampshire 1.073435003 0.4045978 Minnesota State 1.060248659 0.3939826 North Dakota 1.049186531 0.3850639 Denver 1.021083095 0.3894451 Wisconsin 0.977117172 0.3930831 Union 0.970033316 0.3846626 Boston University 0.858155343 0.4045506 Providence 0.844498240 0.4066967 Western Michigan 0.836673102 0.3925581 Rensselaer 0.805906367 0.3886128 Colorado College 0.682153112 0.3829429 Brown 0.643506424 0.3950588 Dartmouth 0.606402213 0.4027125 Cornell 0.601177557 0.3986595 Niagara 0.507046057 0.3407573 St. Lawrence 0.506592196 0.3896454 Nebraska-Omaha 0.501670266 0.4004176 Ohio State 0.484634063 0.3854241 Ferris State 0.458902800 0.3898522 Alaska 0.453101532 0.3881356 Michigan 0.427716979 0.3881034 Merrimack 0.396491819 0.4009867 Northern Michigan 0.339530527 0.3929070 Colgate 0.227082295 0.3924409 Bowling Green 0.219074108 0.3808444 Vermont 0.190351117 0.4109112 Massachusetts 0.162663066 0.4136942 Lake Superior 0.157525549 0.3945560 Maine 0.155738166 0.4019846 Minnesota-Duluth 0.154744103 0.4022561 Robert Morris 0.135182555 0.3384038 Michigan Tech 0.127051859 0.4025306 Princeton 0.088151020 0.4179692 Holy Cross 0.063385350 0.3443918 Michigan State 0.035728909 0.3856090 Connecticut 0.028681519 0.3442945 Harvard 0.001044263 0.4123571 Air Force 0.000000000 0.0000000 Clarkson -0.087168523 0.3859485 Mercyhurst -0.093427249 0.3285750 Canisius -0.124904828 0.3173180 Penn State -0.260184132 0.3994084 Northeastern -0.321786574 0.4311376 RIT -0.341212033 0.3342737 Bemidji State -0.390893122 0.4180260 Alaska-Anchorage -0.665342193 0.4231321 American International -0.688257125 0.3544133 Bentley -0.873450718 0.3580658 Army -1.320134678 0.3763609 Sacred Heart -2.358840449 0.4537438 Alabama-Huntsville -2.443111193 0.6618266
Comment