A fresh minor release of RProtoBuf, now at version 0.2.1, has appeared earlier today on CRAN. RProtoBuf provides GNU R bindings for the Google Protobuf data encoding library used and released by Google. This releases extends the recent 0.2.0 re...

A fresh minor release of RProtoBuf, now at version 0.2.1, has appeared earlier today on CRAN. RProtoBuf provides GNU R bindings for the Google Protobuf data encoding library used and released by Google. This releases extends the recent 0.2.0 re...

The winners of this year's ggplot2 case study competition have been announced. I was honoured to be asked to be a judge of the competition this year, but it was a difficult job with so many excellent entries. In the end, the judging panel (which included Heike Hoffman and Hadley Wickham and me) selected three entries which each demonstrated...

The latest Offensive Politics Housedata file has been released. This file covers 51,463 individual electronic FEC filings for US House committees from 2001 to 10/18/2010.

Ladies and gentlemen, waiting is finally over. I'm proud to introduce Rumpel!

This section will be updated irregularly with pages on applications of BMS. It intends to concentrate on two things: Some add-on code to extend the functionality of BMS in a certain direction, such as e.g. BMA and spatial filtering Usage of BMS to re...

I tried to implement the Strassen's algorithm for big matrices multiplication in R.Here I present a pdf with some theory element, some example and a possible solution in R.I'm not a programmer, so the function is not optimize, but it works.I want to th...

I tried to implement the Strassen's algorithm for big matrices multiplication in R.Here I present a pdf with some theory element, some example and a possible solution in R.I'm not a programmer, so the function is not optimize, but it works.I want to th...

Fringe provides an excellent example of cointegration. This is a television show in which there are two adjacent universes. The universes are almost alike but not exactly. Now, everyone knows that history is chaotic. If a butterfly does an extra flap of its wings, then that difference spreads out to change subsequent events everywhere. But … Continue reading...

his blog post is mainly for Stat 579 students on the homework for week 7, since I received too many “gory” loops in the homework submissions and I think it would help a bit to write my thoughts on R loops for beginners. The immortal motto for newbies in programming is: If you want to

Our "arm" package in R requires Doug Bates's "lme4" which fits multilevel models. lme4 is currently having some problems on the Mac. But installation on the Mac can be done; it just takes a bit of work. I have two...

After recently discovering the excellent methods section on mappingonlinepublics.net, I decided it was time to document my own approach to Twitter data. I’ve been messing around with R and igraph for a while, but it wasn’t until I discovered Gephi that things really moved forward. R/igraph are great for preprocessing the data (not sure how

Hello everyone. Recently I’ve been toying with the idea of extending R-bloggers to other languages then English. After running some checks, I believe it is possible to do (under a sub website inside R-bloggers.com), where people would be able to follow R content on a “language category” of their choosing. Such a project could help map out all the...

After a somewhat long hiatus, RPostgreSQL version 0.1-7 has now been released to CRAN. RPostgreSQL connects R to PostgreSQL database systems using the standard DBI interface. This version fixes a number of issues that had been compiled in the issu...

In part 1 and part 2 we went over the background of nightlights and the fundamental problem: Station inventory data had errors in it: In Hansen 2010, Hansen writes: “ Station location in the meteorological data records is provided with a resolution of 0.01 degrees of latitude and longitude, corresponding to a distance of about 1

The 2010 ggplot2 Case Study Competition Winners have been announced! Congratulations to the winners!Grand Prize: David Kahle, Rice UniversityFinalist: Michael Lavine, UMass Amherst Finalist: Claudia Beleites, TU Dresden & Uni....

The 2010 ggplot2 Case Study Competition Winners have been announced! Congratulations to the winners!Grand Prize: David Kahle, Rice UniversityFinalist: Michael Lavine, UMass Amherst Finalist: Claudia Beleites, TU Dresden & Uni....

In part 1 we discussed UHI in a general way and introduced NASA’s use of nightlights to identify Rural, periurban and Urban stations. Very simply, the latitude and longitude data in the station inventory is used to look up at radiance value in the nightlights file. If that value is 10 or less, the site

Benoît Mandelbrot, the father of fractals, died Thursday at the age of 85. His obituary in the New York Times covers his life and work, and is also a well-written introduction to fractals. Mandelbrot's famous book, The Fractal Geometry of Nature, was an inspiration to me in high school: that a simple question like "How Long Is The Coast...

Bill Alpert of Barron’s has demonstrated the use of R in financial journalism as he criticized the performance of Jim Cramer’s stock picks. Patrick Burns was an advisor for the analysis done in the article. R was an important tool that allowed them to do their research as indicated by Burns in his...

Version 0.2.8 of RcppArmadillo is now on CRAN. This updates the included Armadillo template library to version 0.9.90 which Conrad released two few days ago. RcppArmadillo makes it easy to write highly efficient and highly readable C++ code for line...

Mandelbrot on taxonomy (from 1955; the first publication about fractals that I know of): Searching for Mandelbrot on the blog led me to Akaike, who also recently passed away and also did interesting early work on self-similar stochastic proces...