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This is the final entry in a three-part series about the plumber package. The first post introduces plumber as an R package for building REST API endpoints in R. The second post builds a working example of a plumber API that powers a Slack slash command. In this final entry, ... [Read more...]

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The new 0.4.6 release of RQuantLib arrived on CRAN and Debian earlier today. It is two-fold update: catching up QuantLib 1.14 while also updating to Boost 1.67 (and newer). A special thanks goes to Josh for updating to the binary windows library in t... [Read more...]

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Nate Silver and the FiveThirtyEight folks talked quite a bit this election cycle about how their model was probabilistic. What this means is that they don’t just offer a single prediction (e.g., “Democrats will pick up 10 seats”); instead, their predic... [Read more...]

In the post (https://statcompute.wordpress.com/2018/11/23/more-robust-monotonic-binning-based-on-isotonic-regression), a more robust version of monotonic binning based on the isotonic regression was introduced. Nonetheless, due to the loss of granularity, the predictability has been somewhat compromised, which is a typical dilemma in the data science. On one hand, we don’t ... [Read more...]

We already saw the power of the OneR package in the preceding post. Here we want to give some more examples to gain some fascinating, often counter-intuitive, insights. Shirin Glander of Muenster University tested the OneR package with data from the World Happiness Report to find out what makes people ... [Read more...]

The Game, the Rules Estimating the Average Game Length Estimating the Rate of Goals Scored Simulating the Games R Setup Equal Teams Unequal (but matched) Teams Conclusion Much has been said about how the game of Quidditch is ruined by the scoring system - specifically how it makes no sense ... [Read more...]

The Game, the Rules Estimating the Average Game Length Estimating the Rate of Goals Scored Simulating the Games R Setup Equal Teams Unequal (but matched) Teams Conclusion Much has been said about how the game of Quidditch is ruined by the scoring system - specifically how it makes no sense ... [Read more...]

The Game, the Rules Estimating the Average Game Length Estimating the Rate of Goals Scored Simulating the Games R Setup Equal Teams Unequal (but matched) Teams Conclusion Much has been said about how the game of Quidditch is ruined by the scoring system - specifically how it makes no sense ... [Read more...]

In a recent post, I have discussed performance measures for model selection. This time, I write about a related topic: performance measures that are suitable for selecting models when performing feature selection. Since feature selection is concerned with reducing the number of dependent variables, suitable performance measures evaluate the trade-off ... [Read more...]

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Introduction This blog posts will use several packages from the {tidymodels} collection of packages, namely {recipes}, {rsample} and {parsnip} to train a random forest the tidy way. I will also use {mlrMBO} to tune the hyper-parameters of the random forest. Set up Let’s load the needed packages:

library("tidyverse")
library("tidymodels")
library("parsnip")
library("brotools")
library("mlbench")

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I have completed the polishing/correcting/fiddling of the eight statistical analysis related chapters of my evidence-based software engineering book, and an updated draft pdf is now available (download here). The material was in much better shape than I recalled, after abandoning it to the world 2-years ago, to work ... [Read more...]

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