A recent Wall Street Journal article ruminated about the degree that language shapes thought (rather than the other way around). This idea has rather profound implications in the more specific domain of programming languages. We initially learn a...
R posts in other languages
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- 实现可重复的统计slides
- О связи между “утечкой мозгов” и объемом пассажирских перевозок
- Новая книга по основам прогнозирования (с использованием R)
- Двухфакторный дисперсионный анализ
- Revolution R Enterprise 6.2 mit neuen Funktionen für hoch performante Analysen auf Big Data
- Third Milano R net meeting: leave a comment
- Photos of the third Milano R net meeting
- Presentations of the third Milano R net meeting
Free R Chart iPhone App
Download the free R-Chart iPhone Application for the latest news and updates from top R web sites... (and this blog too).App Store LinkLeave a comment if you have any feedback or suggestions!
Viewing a bipartite network
A short modification of a function to draw bipartite networks in matrix form, with sorting of the network to reflect its nestedness.
Because it’s Friday: Double Rainbow
It's sunny up here in Seattle (I'm attending BioConductor 2010 -- Revolution's a sponsor) now that the morning fog has lifted. So in honor of sunny Friday afternoons, I bring you the Double Rainbow song: (If you've been in a wi-fi-less cave for the past couple of weeks, check out the original.)
An analysis of the Wikileaks data with R
At his Zero Intelligence Agents blog, Drew Conway has taken on the task of performing a quantitative analysis (using R, of course) of the controversial Afghanistan document dump from Wikileaks. He's started with an analysis of the overall flow of information in the five Afghanistan regions, categorized by type of activity (enemy, neutral, etc.). (Click to enlarge.) It's a...
New Fantasy Ball Junkie Article
I have a new post up over at Fantasy Ball Junkie looking at the value of closers in H2H leagues from here on out. I simply simulated in the same way as the Stolen Bases and Home Runs articles from before. Saves are an interesting bunch, and it really...
inline 0.3.6
I released inline 0.3.6 yesterday. This is a minor release which gives better R level errors when there is a compiler error. For example : > tryCatch( cxxfunction( , 'int x = 3 ; x+ ; return R_NilValue ; ' ), error = function(e) print(e$message)...
Visualizing 3d data – plotting quartiles separately
In this previous post, we’ve looked at displaying three dimensional data. One major problem is when there is a high density of data, it can be difficult to see what’s going on in a 3 dimensional plot. One way of looking at the data in more detail is to break it up. Take a look 
Using Optmatch and RItools for Observational Studies
I am a contributor to the optmatch and the RItools packages for R. These two packages are separate, but complimentary. Both packages provide tools for adjusting observational data to exhibit “balance” on observed covariates. In a randomized control trial, treatment and control groups should have identical distributions over all covariates, observed and unobserved. Matching provides a...
The Mule goes SURFing
A month ago I posted about “SURF”, the newly-established Sydney R user forum (R being an excellent open-source statistics tool). Shortly after publishing that post, I attended the inaugural forum meeting. While we waited for attendees to arrive, a few people introduced themselves, explaining why they were interested in R and how much experience they
RcppArmadillo 0.2.4
A new release of RcppArmadillo is now on CRAN. RcppArmadillo makes it easy to write highly efficient and highly readable C++ code for linear algebra (based on Armadillo) in R extensions (using Rcpp for the interface). This release upgrades the include...
RcppArmadillo 0.2.4
A new release of RcppArmadillo is now on CRAN. RcppArmadillo makes it easy to write highly efficient and highly readable C++ code for linear algebra (based on Armadillo) in R extensions (using Rcpp for the interface). This release upgrades the incl...
Red-R
Red-R seems to have some interesting ideas behind it. Of course it needs some time to mature.
IMIS & AMIS
A most interesting paper by Adrian Raftery and Le Bao appeared in the Early View section of Biometrics. It aims at better predictions for HIV prevalence—in the original UNAIDS implementation, a naïve SIR procedure was used, based on the prior as importance function, which sometimes resulted in terrible degeneracy—, but its methodological input is about 
Pie Charts in ggplot2
...and other isomorphic data shape presentations...The Pie Chart has been widely criticized in recent times by statisticians. Edward Tufte goes as far as to call this the "prevailing orthodoxy." The reasons generally cited:The rel...
A free book on probability and statistics with R
G Jay Kerns has published a 400+ page introductory text on Probability and Statistics. All of the examples and illustrations are done using R (as Jay puts it, "The people at the party are Probability and Statistics; the handshake is R") so if you want to brush up on your probability and learn R at the same time, this...
Bootstrap, strap-on, anal-yzing… statistics is getting weirder by the moment
I have spent the better portion of the day trying to get a bootstrap working. I have adapter a pre-written bootstrap function, but I wanted to use a generic function, mostly for reaping fame and glory. My hypothesis was that writing a hand-written, unoptimized function will consume more computer time than the generic, presumably optimized, 
Taking R to the Limit: Parallelization
Video, slides and code of the talk “Taking R to the Limit: Parallelization” by Ryan Rosario at the Los Angeles area R Users Group in July 2010 as follows. Slides: R code: here. Video: If you have a question to … Continue reading →
Notes from useR! 2010
R is a free software environment for statistical computing and graphics, used by a growing number of economists, engineers, and data analysts every day at Google. We’ve even published our R Style Guide on Google Code. The R community has...
Notes from useR! 2010
R is a free software environment for statistical computing and graphics, used by a growing number of economists, engineers, and data analysts every day at Google. We’ve even published our R Style Guide on Google Code. The R community has...
Taking R to the Limit, Part I – Parallelization in R
Tuesday night I had the opportunity to present on high performance computing in R, and the Los Angeles R Users’ Group. There was so much to talk about that I had to split my talk into two parts. The first part was parallelization and the second ...
Blogging about R – presentation and audio
At the useR!2010 conference I had the honor of giving a (~15 minute) talk titled “Blogging about R”. The following is the abstract I submited, followed by the slides of the talk and the audio file of a recording I made of the talk (I am sad it got a bit of “hall echo”, but it’s still listenable…) P.S:...
RUG Introduction: Los Angeles area R Users Group
A nice group of people from academia and industry meeting about once a month at UCLA. Attendance is usually 30-40, but gradually increasing (also about 300 registered members). If you’d like to join, visit the group’s website: http://www.meetup.com/LAarea-R-usergroup/, you’ll find … Continue reading →
IPSUR book used LyX-Sweave
Jay Kerns wrote a book titled "Introduction to Probability and Statistics Using R" or IPSUR for short. He has put up a web site for the book and Rcmdr plugin. There are at least two very important points from my side (I did not read the book, yet): 1. ...
IPSUR book used LyX-Sweave
Jay Kerns wrote a book titled "Introduction to Probability and Statistics Using R" or IPSUR for short. He has put up a web site for the book and Rcmdr plugin. There are at least two very important points from my side (I did not read the book, yet): 1. ...
Taking R to Eleven
R, the open-source statistical software system, is certainly a hot topic these days. It's been the subject of increasing media interest over the last year or so, and the user community is expanding rapidly: there are now about 40 R user groups around the world, and last week's worldwide R User Conference was the most successful ever. So why...
Extension to an R Package: brew gets a weave
I’ve had enough of copy and pasting output from my R session into my email editor, blog, etc. I need something like Sweave for plain text files. In particular, I want the result of parsing <<echo=TRUE>>= f <- function(x) { x + 1 } f(1) @ with Sweave, but without the latex markup. For example,
Social contagion? Maybe not…
Recently there was a lot of racket about results presented in papers by a pair Nicholas Christakis & James Fowler. Their papers gained a lot of attention both in the academic world as well as in media. In their papers they claim to provide evidence for social contagion (transmission through social networks) of several types 
Seamless R and C++ integration
Video of the talk “Seamless R and C++ integration” by Dirk Eddelbuettel at the Los Angeles area R Users Group in March 2010 (to see the video in a larger size, click inside the video but outside the play button):
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
