FORA Technology

Season 2009 Episode 0610

Dan Steinberg on Interaction Detection with TreeNet

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Dan Steinberg on Interaction Detection with TreeNet
AIRED:
Recent advances in machine learning technology make it possible to determine definitively whether or not interactions of any degree need to be included in a predictive model.We can thus establish conclusively, for example, for a given set of predictors, that an additive model (one with no interactions) cannot be improved upon with interactions. Or alternatively, one might prove that a model with interactions will outperform a model without them.Further, we can now identify precisely which interactions are supported by the data, and also the degree of interaction, even in very high dimensional data. The tools we use to achieve these results are extensions of Stanford University Professor Jerome Friedman's TreeNet, developed by the authors and embedded in the Salford Systems TreeNet 2.0 Pro Ex product.Steinberg illustrates the concepts in the context of a real world regression model where we are quickly able to identify all the important interactions with a modest number of boosted tree ensemble models.moreless
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