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 webinar next week that might be of interest. On...
Monthly Archives: April 2011
Review of ‘R in a Nutshell’ by J Adler now in JSS
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 ...
Review of ‘R in a Nutshell’ by J Adler now in JSS
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 ...
Extra! Extra! Get Your gridExtra!
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 concepts, it’s surprisingly easy
Unable to plot a decent x-Axis in a time series plot using zoo
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 →
Time horizon in forecasting, and rules of thumb
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
RcppClassic 0.9.1
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...
Alpha shapes with R and lattice
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 the convex hull. Given a 
Day #18 Error in Knime node R-Plot
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,
When Buffon meets Bertrand
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 to give this problem as a final 
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
