always has the same direction as (m1 − m2. Therefore, Equation (2.233) can be sim plfied by setting SB w = λ′ (m1− m2) for some unknown scalar λ′,
By virtue of the normalization condition wTSW w = 1 from Equation (2.230), the unknown factor can be cancelled:
Get Pattern Recognition now with the O’Reilly learning platform.
O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.