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2005 Oct 12
0
Variance explained in regression trees?
...ar to a complexity penalty for having a tree with many branches when a simpler one would be just as robust. How can I use the values and error bars to interpret what is the "optimal" sized tree? My other question is as follows; other statistical packages (I'm thinking specifically of DTREG) that build regression trees are able to produce a model summary that explains initial variance, amount of variance explained by the tree, and unexplained variance. From this information, an estimated R-sqr is calculated that provides some indication of how well the tree "fits." Does R p...