# Monthly Archives: February 2013

## RcppExamples 0.1.6

February 1, 2013
By

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...

## digest 0.6.2

February 1, 2013
By

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...

## Bootstrap Confidence Intervals

February 1, 2013
By

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 ranging from variance estimation to model selection. John

## Visualizing MLB Hall of Fame votes with R

February 1, 2013
By

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 of Fame voting began in 1936. The circular...

February 1, 2013
By

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 picture version of the tutorial. This

## Yen and JGBs Short-Term vs Long Term

February 1, 2013
By

I have read some articles arguing that the recent move in the Japanese Yen is overdone.  However, considering the short-term without regard to the long-term context is naïve and potentially dangerous.  Although I do not have significant proo...

## Overdispersion with different exposures

February 1, 2013
By

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 because we have to take into account...

## Bayesian model choice for the Poisson model

February 1, 2013
By
$Bayesian model choice for the Poisson model$

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 and basic Monte Carlo methods, looking

## "I don’t wanna grow up": Age / value relationships for football players

February 1, 2013
By

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 first, let us get back to the original graph.