Quote:
Originally Posted by JB987
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Curious...what data or calculation changes explain the reduction of up to almost 3 points from the previous ranking for some teams listed? If the previous calculations were based on results through the 5th week regionals and there has been no additional results/data, what explains the changes observed for this list?
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Since Sumadin and I went off of different data sets (him from TBA CSV's, me from usfirst.org) and used different algorithms, some perturbation is expected. There could've been a few missed matches in one of our data sets. This is my best guess for why there is a difference between our outputs.
Also, different methods of inverting the matrix could cause somewhat substantial differences in the floating-point input.
I haven't had the time to update my program to use TBA's CSV dump, so we won't be able to compare until probably tuesday when my classes end.