Earlier this week, Revolution Analytics' Joe Rickert gave a webinar Introduction to R for Data Mining. You can watch the replay below: If you're already familiar with R and the basics of data mining, you might want to skip ahead to the 13-minute mark where Joe's live demo begins. There ... [Read more...]

The world’s top seven airlines in the style of NASA’s earth at night. (via Mapping the World’s Biggest Airlines | Spatial Analysis) [Read more...]

Here are the slides given during the Montreal R User Group workshop on April 30, 2012. RR-MtlRUsers.beamer [Read more...]

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Warning: what follows is a somewhat technical discussion of my love-hate relationship with the R statistical language, in which I somehow manage to waste 2,400 words talking about a single line of code. Reader discretion is advised. I’ve been using R to do most of my statistical analysis for about 7 ... [Read more...]

The graph for figure 8.4 requires to be somehow careful about correctly lagging the CRP value when calculating the weights.# fig 8.4 of Cover "Universal Portfolios"require(logopt)x [Read more...]

I fought with my LαTεX compiler this morning as it did not want to deal with my code: looking on forums for incompatibilities between beamer and algorithmic, and adding all kinds of packages, to no avail. Until I realised one \STATE was missing: (This is connected with my ... [Read more...]

The program of the first R meeting that will be held in Bordeaux (France), the 2nd and 3rd of July, is now available at http://r2012.bordeaux.inria.fr/programme.html. It includes special sessions about mixed models, visualization, classification, data ... [Read more...]

This is update 4 to my original post about predicting the NBA playoffs with R. With the Thunder beating the Spurs and the Heat losing to the Celtics, the algorithm went 1-1 on predictions, making it 5-3 so far.Making some improvements I have been posting for some time about incorporating ... [Read more...]

On June 29, the Royal Statistical Society will host six hours of presentations about R, under the banner "To R, or not to R, that is the question". Speakers include R Core member Prof Uwe Ligges, Dr Wayne Jones (from Shell UK), and Dr Peter Nash (from Imperial College London), among ... [Read more...]

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There are many resources on the use of colours in R, several packages, and a number of schemes already implemented in ggplot2. In the previous part, we saw how ggplot2 selects a default colour palette according to the type of variable, discrete or cont... [Read more...]

Bill Venables talks R :: Augsburg University, Germany :: 2-3 July 2012 Bill Venables will give a two-day R Workshop in Augsburg on the 2nd and 3rd July 2012, an expanded [Read more...]

The map above shows the routes flown by the top 7 airli [...] [Read more...]

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Recently I have stumbled on a problem with split function applied on list of factors. The issue is that it might produce wrong splits when splitting factors contain dots.Here is the example of the problem. Invoking the following code:df [Read more...]

A while back I was running a bunch of JAGS models through R, using the rjags (written by Martyn Plummer) and R2jags (by Yu-Sung Su) packages. These packages provide a great interface to the JAGS software, which allows analysis of … Continue reading → [Read more...]

A few more comments on the specific entry on ABC written by Mikael Sunnåker et al…. The entry starts with the representation of the posterior probability of an hypothesis, rather than with the posterior density of a model parameter, which seems to lead the novice reader astray. After all, (... [Read more...]

I recently finished a long stretch of work on a particular project that required me to draw upon four R packages.  Each time I got back to my work on the project, I’d have to load the packages manually, as … Continue reading → [Read more...]

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