Quote:
Originally Posted by Ed Law
Because of the way our matrices are assembled, as long as every team has played at least one match, the matrix is invertable. That is because the diagonal terms are the number of matches that team played, which is why OPR can not be calculated until you have some matches done. Otherwise you will have some zeroes at the diagonal terms and it will make your matrix become singular and can not be inverted.
Ed
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Ah that would be it. The matrix in the pdf has a team which has played no matches.
If they want my business, then they should act accordingly. If they don't, I am quite happy to take my business (and that of my $16.5 billion organization) elsewhere. - dlavery [more] 
09-03-2009, 11:21
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