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GPU Accelerated XGBoost Decision tree learning and gradient boosting have until recently been the domain of multicore CPUs. Here we showcase a new plugin providing GPU acceleration for the XGBoost library. The plugin provides significant speedups over multicore CPUs for large datasets. The plugin can be found at: https://github....

In my last post I created a gene homology network for human genes. In this post I want to extend the network to include edges for other species. First, I am loading biomaRt and extract a list of all available datasets. library(biomaRt) ensembl = useM...

Per request from a couple of students in a course on open data that I contribute to, here’s a short guide to the “why” and “how” questions about (Web) scraping, with links to examples to illustrate the usefulness of the technique. What is scraping? (Web) Scraping consists in writing ...

R picked up a nifty way to organize sequential calculations in May of 2014: magrittr by Stefan Milton Bache and Hadley Wickham. magrittr is now quite popular and also has become the backbone of current dplyr practice. If you read my last article on assignment carefully you may have noticed I ...

This is the fourth part of the of the post where are going to create figure 4 Plot of Inventory Completeness against sample size for grid cells. Part 3 of this series we created chronohorogram for understanding seasonality by year of the data records. If you have not already done so, please ...

There are some graphs that you cannot forget. One graph that I found puzzling was mentioned on Andrew Gelman’s blog, a few years back, and was related to rupture detection What I remember from this graph is that if you want to get a rupture, you can easily find ...