If you'd like to learn more about using the PMML package in R to export statistical models, or if you'd just like to learn more about building predictive models in Revolution R and creating predictions (scores) from them in other applications or in the cloud, I'll be co-presenter on a ... [Read more...]

Volume 40 of of the (electronic) Journal of Statistical Software just came out. It contains my short review of Josef Adler's already pretty popular R in a Nutshell from O'Reilly. You can my review as a pdf via this local preprint, or by visiting the ... [Read more...]

The more I use it, the deeper I fall in love with ggplot2. I know, some of you have heard me kvel about it ad nauseum (oh, yiddish and latin in one sentence – extra points!). But the graphs really look great, and once you wrap your head around a few ... [Read more...]

I use the R package zoo to plot a yearly time series of weekly averaged data. The problem is that my date variable (m.all$date) contains week numbers and these are plotted as x-Axis. What I would rather like to to … Continue reading → [Read more...]

I recently received an email about forecasting and rules of thumb. "Dans la profession [...] se transmet une règle empirique qui voudrait que l'on prenne un historique du double de l'horizon de prévision : 20 ans de données pour une prévision [Read more...]

Another pure maintenance release, this time of RcppClassic, the package supporting the deprecated older classic Rcpp API defined in the earlier 2005 to 2006 releases, is now on CRAN It contains no new code, but smoothes one or two edges in the buil... [Read more...]

What are the alpha shapes?: “The concept of alpha shapes formalizes the intuitive notion of “shape” for spatial point set data, which occurs frequently in the computational sciences. An alpha shape is a concrete geometric object that is uniquely defined for a particular point set.[...] Alpha shapes are generalizations of ... [Read more...]

Hello again Today I am experiencing something weird. The last days I have been experimenting with the R-scripting nodes from knime and with their templates. But today this happened. The node is executed without errors, but when I try to open the view, [Read more...]

When Peter Diggle gave his “short history” of spatial statistics this morning (I typed this in the taxi from Charles de Gaulle airport, after waiting one hour for my bag!), he started with a nice slide about Buffon’s needle (and Buffon’s portrait), since Julian Besag was often prone ... [Read more...]

I realized I never announced this on the blog, so without further ado.... Rcpp Workshop in Chicago on April 28, 2011 This year's R/Finance conference will be preceded by a full-day masterclass on Rcpp and related topics which will be held on... [Read more...]

I just uploaded version 1.2.1 of pgfSweave, and I think it is just great! The most notable new feature is the use of the TikZ externalization library list and make feature instead of the pgf \begingraphicnamed functionality. This has some important consequences: PGF 2.10 is required! This has been out for some ... [Read more...]

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A pure maintenance release of RcppGSL---our interface package between R and the GNU GSL using our Rcpp package for seamless R and C++ integration---is now on CRAN It contains no new code, but smoothes one or two edges in the build process and noti... [Read more...]

A recent R-help post asks for examples of Sweave use for web appliations. I think there is very little out there; maybe nothing. Below is a proof of concept for web-based Sweave-ing with rApache. But, it will soon be possible to do this with R's built-in web server. The idea ... [Read more...]

Ever tried to find a specific function or algorithm in R that you're sure that someone has implemented in a CRAN package, but you don't know which one? Now you can find it, in the R Packages section of R community site inside-R.org. The R Packages section now includes ... [Read more...]

Ran across a technical report I wrote in April 2009 regarding my work linking REDCap with rApache. Here’s the introductory text and a link to the original report (note that way back then I was calling it Rapache - now it’s rApache - don’t ask): ... [Read more...]

A brand new and shiny 0.9.3 release of Rcpp is now on CRAN and Debian. This version contains an actual bug fix for Rcpp modules and a few build improvements, including for both clang/llvm and g++-4.6 (which, being in Debian, is already used for c... [Read more...]

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