Posts Tagged ‘ Boost Algorithms ’

Boost to tackle nonlinearity

June 1, 2010
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data nonlinear; do x=1 to 627; p=(sin(x/100)+1)*0.45; do j=1 to 100; x1=x+(j-1)/100; if ranuni(8655645)<=p then y=1; else y=0; output; drop p j; end; end; run; proc rank data=nonlinear out=nonlinearrank...
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Improve the Boost macro from Prof. Rayens, W and Dr. Johnson, K

April 21, 2010
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In Chapter 2 of the book "Pharmaceutical Statistics Using SAS: A Practical Guide" (SAS Press), Prof. Rayens, W and Dr. Johnson K. presented their SAS implementation of boost algorithms, including AdaBoost, RealBoost, GentleBoost and LogitBoost. The o...
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Implement Boost Algorithm in SAS

March 29, 2010
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 algorithms are proven to be very effective data mining tools, either used stand alone, or as a building block to handle nonlinearity, etc. Implementation of Boost algorithm in SAS is not easy to find although it is not difficult to wr...
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An efficient macro for Stump – two terminal nodes tree

February 17, 2010
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In this post, I post an improved SAS macro of the single partition split algorithm in Chapter 2 of "Pharmaceutical Statistics Using SAS: A Practical Guide" by Alex Dmitrienko, Christy Chuang-Stein, Ralph B. D'Agostino. The single part...
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