The latest version of futile was released to CRAN yesterday. This release broke out the various functions into self-contained sub-packages …Continue reading »

The relatively (to this decade) cool 2008 global temperatures spurred talks of a warming pause, or even global cooling. The claim usually comes from people who cherry picked either data sets and(!)/or start and end points of the global temperature trends to back up their allegation. The blogosphere already has a lot on this: Skeptical

Since my first representation of the rank statistic as paired was incorrect, here is the histogram produced by the simulation perm=sample(1:20) saple=sum(abs(sort(perm)-sort(perm))) when . It is obviously much closer to zero than previously. An interesting change is that the regression of the log-mean on produces > lm(log(memean)~log(enn)) Call: lm(formula = log(memean) ~ log(enn)) Coefficients: (Intercept)

How many times have you been disappointed by nice trading system, because neither trading cost or slippage or bid/ask spread were included into back-test results? Did you find difficult to back-test a portfolio in R or many portfolios with different stocks? Blotter package is supposed to solve these problems. In really – it is complicated. I

I've been using GenABEL for some time now for GWAS analysis using related individuals. It has an excellent set of functions for estimating a kinship matrix from a dense marker panel and then using this in a linear mixed effects model to allow for relat...

While there's been an informal coterie of R users in the Chicago area for some time (notably the fine folks behind the successful R/Finance conferences) there hasn't been a formal R User Group. Until now, that is. JD Long has taken the plunge and announced the new Chicago R User Group on meetup.com. If you're in the Chicagoland area,...

Here is my personal list of rules of thumb for people who want to meet some R gurus (quickly) in the R help mailing list ([email protected]): If you want to meet Dr Bill Venables, just say something about Type III Sum of Squares (better if you also mention the “unbeatable” SAS); If you want to

MATLAB has a nice program called pplane that draws phase planes of differential equations models. pplane on MATLAB is an elaborate program with an interactive GUI where you can just type the model to draw the phase planes. The rest you fidget by clicking (to grab the initial conditions) and it draws the dynamics automatically.

R Twitterer ech0chrome reports that (s)he has successfully installed R on an iPhone. I haven't tried it myself, since it requires jailbreaking the iPhone, but full instructions have been posted to the R Wiki. It seems that once you have Debian installed on the iPhone, it's simply a matter of installing the required Debian packages. Seems like a neat...