he formatR package has been silent for quite a few months now. Recently I’ve been moving my old packages from R-Forge to GitHub, and I finally killed several things on my TODO list. In the past, I made an awkward decision to let formatR depend on the animation package, ... [Read more...]

Following on from the previous post about creating a football result processing function for data from the football-data.co.uk website we will add code to the function to generate a league table based on the results to date. To create the league table we need to count various things ... [Read more...]

The translation of the book Introducing Monte Carlo Methods with R is close to being completed. The copy-editing and page-setting are done, I have received the cover proposal and am happy with it, so it should now go to production and be ready by early January, (earlier than the tentative ... [Read more...]

Acceptance-rejection methods This post is based on chapter 1.4 of Advanced Markov Chain Monte Carlo. Another method of generating random variates from distributions is to use acceptance-rejection methods. Basically to generate a random number from , we generate a RN from an envelope distribution , where .  The acceptance-rejection algorithm is as follows: Repeat ... [Read more...]

The final course (since courses end this week in Montréal) can be watched here and there. The drawings from the course can be downloaded here (including last week's). First, to come back on last week's course , we considered Lee-carter model, i.e.... [Read more...]

must admit that I have been tired of maintaining my R packages for a long time, and the main reason is I feel really uncomfortable with writing R documentations (Rd). The required structure of an R package mainly includes two directories R and man — the former for the R source ... [Read more...]

This week(end), the Le Monde puzzle can be (re)written as follows (even though it is presented as a graph problem): Given a square 327×327 symmetric matrix A, where each non-diagonal entry is in {1,2,3,4,5} and , does there exist a triplet (i,j,k) such that Solving this problem in R ... [Read more...]

Sweave is a literate programming system included with R. It makes it possible to create a PDF document containing not just text, but also tables and charts generated from R. The process is automated, so once you've created an Sweave document (which includes both LaTeX text markup and R commands), ... [Read more...]

Earlier in the year, Romain and I did a bunch of initial work on a wrapper from R to the GNU GSL by way of our Rcpp package for seamless R and C++ integration. But other work kept us busy and this fell a little to the side. We have ... [Read more...]

The visualization represented by Hans Rosling’s TED talk was very impressive. FlowingData provides a tutorial on making bubble chart in R. I prefer ggplot2 for graphics. [Read more...]

People rave about Sweave and the literate programing paradigm and I am guilty as charged. I speak Sweave, I think Sweave, I dream Sweave. As a matter of fact my default mode of operation is Sweave and anything else is an … Continue reading → [Read more...]

Gene Ontology is the de facto standard for annotation of gene products. It has been widely used in biological data mining, and I believe it will play more central role in the future. Publications mentioning GO was collected and deposited in GO ftp, and can be accessed (ftp://ftp.geneontology.... [Read more...]

The new RQuantLib release 0.3.5 is now on CRAN and in Debian. RQuantLib combines (some of) the quantitative analytics of QuantLib with the R statistical computing environment and language. Most of the changes were made two and four weeks ago: fir... [Read more...]

Just released an updated version of our 'aqp' package for quantitative soils investigations, available on CRAN and R-Forge. Some of the major changes are listed below: from the aqp NEWS file: -------------------------- aqp 0.98-1 (2010-11-23) --------... [Read more...]

It's been a busy fall season for the team at Revolution Analytics. Over the past few months, we've announced major product enhancements for Revolution R -- RevoScaleR, for tackling big data sets, and RevoDeployR, for embedding Revolution R into wider applications. We've continued to add to our growing customer base ... [Read more...]

rggobi is the first package which didn't survive my transition from 32-bit to 64-bit in R 2.11.1. Fortunately, installing the package from source fixes it, and Hadley Wickham has posted the prerequisites and procedure. [Read more...]

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I started to develop GOSemSim package two years ago when I was not quite familiar with R. I am very happy to see that someone use it and found it helpful. I try to learn S4 and redesign GOSemSim with S4 classes and methods in the pass two weeks, and ... [Read more...]

As so often happens these days, a brief post at FriendFeed got me thinking about data analysis. Entitled “So how many retractions are there every year, anyway?”, the post links to this article at Retraction Watch. It discusses ways to estimate the number of retractions and in particular, a recent ... [Read more...]

Probably everyone has seen Hans Rosling’s famous TED talk by now. I recently came across a couple of other exceptional talks on data visualization: Hans Rosling again: Let my dataset change your mindset. If only all statistics lecturers were this dynamic! David McCandless: The beauty of data visualization. Not ... [Read more...]