Publications by heuristicandrew

Binomial confidence intervals: exact vs. approximate

This graph and R code compares the exact vs. normal approximations for 95% binomial confidence intervals for n trials with either one success or 50% success. Continue reading → Related To leave a comment for the author, please follow the link and comment on their blog: Heuristic Andrew » r-project. R-bloggers.com offers daily e...

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Predicting optimal of iterations and completion time for GBM

When choosing the hyperparameters for Generalized Boosted Regression Models, two important choices are shrinkage and the number of trees. Generally a smaller shrinkage with more trees produces a better model, but the modeling time significantly increases. Building a model with too many trees that are heavily cut back by cross valida...

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