I burned through all of my extra lives in a matter of minutes, and my two least-favorite words appeared on the screen: GAME OVER (Ernest Cline, Ready Player One) Inspired by the book I read this summer and by this previous post, I decided to draw these aliens: Do not ... [Read more...]

Over the years, I've meticulously compiled–and version controlled–massive and extensive configuration files for virtually all of my most used utilities, most notably vim, tmux, and zsh. In fact, one of the only configurable utilities for which I had no special configuration schema was R. This is extremely surprising, ... [Read more...]

This post displays two animated choropleths. One for global mortality rates for children under 5 (per 1000 live births) and the second for the difference in global mortality rates for males and female children under 5 (per 1000). Please click here:&nbs... [Read more...]

We're about to release the new version of BCEA, which will contain some major changes.A couple of changes in the basic code that should improve the computational speed. In general, BCEA doesn't really run into troubles because most of the computations ... [Read more...]

I'm speaking at the DataWeek conference in San Francisco today. My talk follows Skylar Lyon from Accenture — I'm really looking forward to hearing how he uses Revolution R Enterprise with Teradata Database to run R in-database with 400 million rows of data. Update: Here are Skylar's slides. The slides for my ... [Read more...]

I was offline much of the day Tuesday and completely missed Hadley Wickham’s tweet about the new rvest package: Are you an #rstats user who misses python's beautiful soup? Please try out rvest (http://t.co/PeiIHr3jDW) and let me know what you think.— Hadley Wickham (@hadleywickham) September 12, 2014 ... [Read more...]

Just few hours before Scots head to the polls, there is not an overwhelming advantage of the anti-independence vote. Actually, the margin is shorter than last time I looked at it, but despite such a growing trend in favor of the "Yes" campaign in the last weeks, the "NO" side ... [Read more...]

Please click on the image for information on how to use R and ggplot2 to generate this plot.  [Read more...]

A while back, I wrote a post simply announcing a recent paper that described a new statistic called the "Maximal Information Coefficient" (MIC), which is able to describe the correlation between paired variables regardless of linear or nonlinear relationship. This turned out to be quite a popular post, and included ... [Read more...]

I built an interactive Shiny application that uses simulated annealing to solve the famous traveling salesman problem. You can play around with it to create and solve your own tours at the bottom of this post. Here's an animation of the annealing process finding the shortest path through the 48 state ... [Read more...]

I have added a (very rough) first draft to the Size Structure chapter of the forthcoming Introductory Fisheries Science with R book on the book’s fishR webpage.  Accompanying this chapter are major changes to all of the proportional size distribution … Continue reading → [Read more...]

This post displays two animated choropleths. One for global mortality rates for children under 5 (per 1000 live births) and the second for the difference in global mortality rates for males and female children under 5 (per 1000). This was put together after my wife sent a link to this optimistic story on NPR’... [Read more...]

Just few hours before Scots head to the polls, there is not an overwhelming advantage of the anti-independence vote. Actually, the margin is shorter than last time I looked at it, but despite such a growing trend in favor of the “Yes” campaign in the last weeks, the “NO” side ... [Read more...]

So now that we’ve collected data from the web and wrangled it into something useful, what can we say about how accurate Next Bus is? This post is about the “making of the analysis” … which might be rather boring to those non data geeks (normal people). If you’re ... [Read more...]

Version number 1.4.3541 of PerformanceAnalytics was released on CRAN today. If you’ve been following along, you’ll note that we’re altering our version numbering system.  From here on out, we’ll be using a “major.cran-release.r-forge-rev” form so that when issues are reported it will be easier for ... [Read more...]

The R Foundation for Statistical Computing, the Vienna-based non-profit organization that oversees the R Project, has just added several new "ordinary members". (Ordinary members participate in R Foundation meetings and provide guidance to the project.) The new members are: Dirk Eddelbuettel, Torsten Hothorn, Marc Schwartz, Hadley Wickham, and Achim Zeileis, ... [Read more...]

By Jinjing Xie – Consultant, Shanghai. The challenge here is interesting but also very clear: for a given un-ordered vector of numbers, select from it a longest increasing (or decreasing) subsequence. This subsequence may not be unique. For example, in the … Continue reading → [Read more...]

I talked a little bit about tidy data my recent post about dplyr, but you should really go check out Hadley’s paper on the subject. R expects inputs to data analysis procedures to be in a tidy format, but the model output objects that you get back aren’t ... [Read more...]

Had a headache last night, so decided to take things easy and just read posts Google+. Then I came across this post which seems interesting so I thought I would play around before I head to bed. First of all, I thought generating a square base would be much easier ... [Read more...]

Last Friday we had guests from Belgium and the Netherlands joining us in Cologne. Maarten-Jan Kallen from BeDataDriven came from The Hague to introduce us to Renjin, and the guys from DataCamp in Leuven, namely Jonathan, Martijn and Dieter, gave an overview of their new online interactive training platform.RenjinMaarten-Jan ... [Read more...]