| Department of Mathematical Sciences Colloquium Series |
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The University of Montana
3:10 p.m. in Math 103
4:00 p.m. Refreshments in Math Lounge 109
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Joran Elias The University of Montana |
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| In this talk we will discuss classification and regression trees as statistical learners, particularly their use as part of an ensemble. We will discuss the increasing role that randomness has played in developing new tree ensemble techniques. Specifically, it has remained somewhat unclear as to why the simple act of randomizing the tree growing algorithm should lead to the dramatic improvements in performance that have been observed. We will introduce the recent suggestion that a specific type of tree ensemble acts by forming a locally adaptive distance metric as a possible explanation and briefly outline a generalization of this claim to include all tree ensemble methods. | ||||||
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Monday, 20 April 2009 3:10 p.m. in Math 103 4:00 p.m. Refreshments in Math Lounge 109 |
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