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A pure maintenance release 0.1.6 of RcppExamples was made two weeks ago, and never announced. We merely moved the NEWS.Rd file into the proper location in the inst/ directory, and, while were at it, mentioned the new Rcpp Gallery in the DESCRIPTION fi... [Read more...]

digest version 0.6.2 came out a few days ago as an almost immediate follow-up to release 0.6.1. We used paste0() in a few places, and this is only available with newer versions of R. To not introduce as somewhat unnessecary dependency, we reverted thi... [Read more...]

Here is an example of nonparametric bootstrapping.  It’s a powerful technique that is similar to the Jackknife. With the bootstrap, however, the approach uses re-sampling. It’s clearly not as good as parametric approaches but it gets the job done. This can be used in a variety of situations ... [Read more...]

Carlos Scheidegger and Kenny Shirley created this visualization of votes for the Major League Baseball hall of fame: They describe the chart as follows: The main figure above is a plot of BBWAA Hall of Fame voting by year for all 1,070 players who have appeared on the ballot since Hall ... [Read more...]

So you’ve finally managed to install the pesky environment but have no idea what you are looking at when you open the program. This tutorial is for you. (Again, here is a version with screenshot pictures). When you open R, it might look different than the screenshots in the ... [Read more...]

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In actuarial science, and insurance ratemaking, taking into account the exposure can be a nightmare (in datasets, some clients have been here for a few years – we call that exposure – while others have been here for a few months, or weeks). Somehow, simple results because more complicated to compute just ... [Read more...]

Following Arthur Charpentier‘s example, I am going to try to post occasionally on material covered during my courses, in the hope that it might be useful to my students, but also to others. In the second practical of the Bayesian Case Studies course, we looked at Bayesian model choice ... [Read more...]

I have been trawling around for a while now trying to find a simple and understandable way of representing geospatial data in R, whilst retaining the ability to manipulate the visualisation in ggplot. After much searching I came across some articles which got me to a working product only after ... [Read more...]

Let's get back to the age-value relationship from my last post. I did some more plotting to see on which position this inversed U-shaped relationship is strongest. Please note, that I use a dataframe called eu.players throughout this post, which holds downloaded football player information from transfermarkt.de.But ... [Read more...]

I recently had to convert a dataset that I was working with from a wide format to a long format for my analysis.  I struggled with this a bit, but finally found the right sources and the right package to do it, so I thought I'd share my practical ... [Read more...]

You’ve got a pdf file and you’d like to view it with whatever the system viewer is. As usual, that requires something special for Windows and something general for the rest of us. Here goes… openPDF [Read more...]