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Re: DM: RE: Pruning methodsFrom: Kathryn Horne Date: Thu, 16 Mar 2000 12:38:19 -0800 The CART(r) Monograph is available through CRC Press. You will find a link to them on our webside on the CART products page. You will also find a brief discussion of splitting rules within the white papers. At 04:00 PM 3/15/00 +0000, you wrote: > >Donal Lyons wrote: > > > For CART the definitive book is Leo Breiman et al., Classification and > > Regression Trees (CART), Wadsworth & Brooks, 1984. > >I heard a rumour that this has long been out of print, and has recently >been reprinted by somebody. Although amazon still quote 4-6 weeks >on the original. I would be pleased to receive clarification if anybody >knows the true situation. > >The original poster may also be interested in >http://www.amstat.org/publications/jcgs/abstracts98/leblanc.html >Monotone Shrinkage of Trees >Michael LeBlanc and Robert Tibshirani >We investigate a new method for regression trees which obtains >estimates and predictions subject to constraints on the coefficients >representing the effects of splits in the tree. The procedure leads >to both shrinking of the node estimates and pruning of branches in >the tree and for some problems gives better predictions than cost- >complexity pruning used in the classification and regression tree >(CART) algorithm. The new method is based on the least absolute >shrinkage and selection operator (LASSO) method developed by >Tibshirani. > >Peter > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Kathryn Horne Managing Director Salford Systems 8880 Rio San Diego Drive, Suite 1045 San Diego, CA 92108 619.543.8880 http://www.salford-systems.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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