The WordPress.com stats helper monkeys prepared a 2014 annual report for this blog. Here’s an excerpt: The Louvre Museum has 8.5 million visitors per year. This blog was viewed about 260,000 times in 2014. If it were an exhibit at … Continue reading → [Read more...]

I finally finished my first Shiny application! You can click this link to check it out. Below is a screenshot of what it looks like. I got all the data from the United States Census Bureau website. What the app does is provide a comparison of average income by race ... [Read more...]

Once you know how to create simple plots you’ll want to learn how to design more sophisticated plots. A large part of being able to design sophisticated plots is having control over the “non-data elements” of the plot, such as the plot title and axis titles.You want to ... [Read more...]

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Contrary to general expectations, or at least to my exp [...] [Read more...]

A new version of RcppGSL is now on CRAN today. This package provides an interface from R to the GNU GSL using our Rcpp. Similar to the recent RcppClassic release, this update was triggered by the CRAN maintainers desire to keep the Makefile free of G... [Read more...]

As previously mentioned, caret has two new feature selection routines based on genetic algorithms (GA) and simulated annealing (SA). The help pages for the two new functions give a detailed account of the options, syntax etc. The package already has functions to conduct feature selection using simple filters as well ... [Read more...]

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The team at RStudio have just released an update to the immensely useful dplyr package, making it even more powerful for manipulating data frame data in R. The new 0.4.0 version adds new "verbs" to the syntax for mutating joins (left join, right join, etc.), filtering joins, and set operations (intersection ... [Read more...]

Another post on Cluster Analysis and the NFL, this time on the Perceivant.com blog.http://perceivant.com/nfl-ranking-cluster-analysis/ [Read more...]

Shiny takes inputs from UI elements and sends them to the server, where the application... [Read more...]

This semester, I’ll be teaching an introduction to applied econometrics with R, so I’ve decided to write a very small book called “Introduction to programming Econometrics with R”. This is primarily intended for bachelor students and the focus is not much on econometric theory, but more on how ... [Read more...]

A brand new and shiny version of rfoaas is now on CRAN. The rfoaas package provides an interface for R to the most excellent FOAAS service--which provides a modern, scalable and RESTful web service for the frequent need to tell someone to f$#@ off. T... [Read more...]

The typical introduction to item response theory (IRT) positions the technique as a form of curve fitting. We believe that a latent continuous variable is responsible for the observed dichotomous or polytomous responses to a set of items (e.g., multipl... [Read more...]

Eurostat has information on death rates by cause and NUTS 2 region. I am trying to get this visually displayed on the map. To get there I map all causes to three dimensions via a principal components analysis. These three dimensions are subsequently tr... [Read more...]

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A maintenance release of RcppClassic, now at version 0.9.6, went out to CRAN today. This package provides a maintained version of the otherwise deprecated first Rcpp API; no new projects should use it. No changes were in user-facing code. The Makevar... [Read more...]