1 - Oregon State University
1 - Oregon State University
1 - Oregon State University
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Representing P(Y|X) using boostedregression trees Friedman: Gradient Tree Boosting (2000; Annals ofStatistics, 2011) Consider logistic regression: logP Y=1P Y=0= β 0 + β 1 X 1 + ⋯ + β J X JN D = X i , Y i i=1 Log likelihood:are the training examples LL β = Y i log P Y = 1 X i ; β + 1 − Y i log P Y = 0 X i ; βi14TAAI 201111/11/2011
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