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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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Vectors are a basic data structure in R and are created using the c() function. Unlike data frames and lists, the elements of a vector must be of the same mode. Functions can be used on a vector. For example, length(x) can be used to find the number of ... [Read more...]

All my recent plots are built using ggplot2 package. I don’t know if my dear readers have noticed the difference, but from my point of view, ggplot2 allows to create nice looking and aesthetics plots. I was using this package before, but the real boost came after reading this ... [Read more...]

To install the community nodes in knime: help __ install new software __ http://tech.knime.org/update/community-contributions/release you’ll only need the “R and Groovy scripting extensions for KNIME” What is it and what does it... [Read more...]

First, go take a look at this website: http://rgg.r-forge.r-project.org/docs.html At “6. RGG Elements” you can see which GUI elements you can give to the user and which functions they have. Then, open a textfile and call it however you want... [Read more...]

A build-fix release RQuantLib 0.3.7 is now on CRAN and in Debian. RQuantLib combines (some of) the quantitative analytics of QuantLib with the R statistical computing environment and language. Thanks to the help by Brian Ripley (who compiled Quan... [Read more...]

Conrad Sanderson made a bug-fix release (1.1.92) by for his wonderful Armadillo templated C++ library for linear algebra appeared yesterday and as usual a new release 0.2.18 of RcppArmadillo, our Rcpp-based integration into R is now on CRAN mirrors. ... [Read more...]

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The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center offers several data sources. For example, it is possible to download a text file with the 22-year (July 1983 – June 2005) monthly and annual average of global horizontal irradiation. nasafile [Read more...]

A violin plot is a combination of a boxplot and a kernel density plot. Lattice includes the panel.violin function for this graphical tool. This example draws a violin and a boxplot together. First, let’s download some solar radiation data from the NASA webpage: nasafile [Read more...]

Last week Jack Edwards raised the fact that Milan Lucic was the first Bruin player to join the 30 Goal / 100 Penalty Minute club in a few years.  It got me thinking about the other players who have accomplished … Continue reading → [Read more...]

I am a big Boston Bruins fan and have enjoyed the ups and downs over the last few years, regardless of the catastrophes that have occurred during the playoffs.  The team struggled a few weeks ago, but have recently seemed … Continue reading → [Read more...]

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