ggtree provides many helper functions for manupulating phylogenetic trees and make it easy to explore tree structure visually. Here, as examples, I used ggtree to draw capital character G and C, which are first letter of my name :-). To draw a tree in such shape, we need fan layout (...

The Riddler of this week had a riddle that is a variation of the knight tour problem, namely “…how long is the longest path a knight can travel on a standard 8-by-8 chessboard without letting the path intersect itself?” the riddle being then one of a self-avoiding random walk [kind]… ...

As part of our continuing effort to digitise poetry and to automate new forms of poetry, we released an R package called pattern.nlp, which is available at https://github.com/bnosac/pattern.nlp . It allows R users to do sentiment analysis and Parts of Speech tagging for text written ...

The Consumer Price Index (CPI) is the main standard for tracking the inflation of the U.S. dollar. The various CPI measures are published monthly by the Bureau of Labor Statistics. For this walk-through, we will be using the blcsrapeR package to download our data from the BLS and perform ...

Following my earlier post on Delyon and Portier’s proposal to replacing the true importance distribution ƒ with a leave-one-out (!) kernel estimate in the importance sampling estimator, I ran a simple one-dimensional experiment to compare the performances of the traditional method with this alternative. The true distribution is a N(0,½) with ...

In my previous blog post, I was focusing on data manipulation tasks with RevoScaleR Package in comparison to other data manipulation packages and at the end conclusions were obvious; RevoScaleR can not (without the help of dplyrXdf) do piping (or chaining) and storing temporary results take time and on top ...