Feature selection is an important step for practical commercial data mining which is often characterised by data sets with far too many variables for model building. In a previous post we looked at all-relevant feature selection using the Boruta package while in this post we consider the same (artificial, toy) examples using the caret package. ...
In case you missed them, here are some articles from October of particular interest to R users. Reviews of the winners and finalists of the 2010 ggplot2 case study competition. We have published a new article "R is Hot", with interviews from a dozen R users in industry and academia. A new code highlighting tool for displaying R code...
A few weeks ago, I shared a series of choropleth maps of U.S. presidential election returns, illustrating the relative support for Democratic, Republican, and third Party candidates since 1920. The granularity of these county level results led me to wonder whether it would be possible to develop an isarithmic map of presidential voting using the … Read more
You might recall we posted a couple of weeks ago this chart summarizing the times of the day Firefox users switch on Private Browsing mode: The chart, based on data from the Mozilla Test Pilot program tells an interesting story about the habits of Web users. But what other interesting stories could be told, to reveal more insights into...
Mortgage rates have been at historic lows recently. The rates are posted various places online along with simple mortgage calculators. Such calculators illustrate the payment schedule for a mortgage based upon selected terms. But with less ...
Mortgage rates have been at historic lows recently. The rates are posted various places online along with simple mortgage calculators. Such calculators illustrate the payment schedule for a mortgage based upon selected terms. But with less ...
Part of the reason R has become so popular is the vast array of packages available at the cran and bioconductor repositories. In the last few years, the number of packages has grown exponentially! This is a short post giving steps on how to actually install R packages. Let’s suppose you want to install the 
Complaints about the iPhone App Store are not uncommon among developers. The submission process is frustrating at best, you can expect arbitrary rejections, and Apple's policies have not always been particularly open or welcoming. &...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
