John Kastellec, Jeff Lax, and Justin Phillips write: Do senators respond to the preferences of their states' median voters or only to the preferences of their co-partisans? We study responsiveness using roll call votes on te...

John Kastellec, Jeff Lax, and Justin Phillips write: Do senators respond to the preferences of their states' median voters or only to the preferences of their co-partisans? We study responsiveness using roll call votes on te...

Wow, is it the middle of July already? Anyway, in case you missed them, here are some articles from June of particular interest to R users. We noted that the program for the annual R user conference, useR! 2010, has been announced. (I and the rest of the Revolution team are looking forward to seeing all the R folks...

The always-interesting R blogger and political scientist Drew Conway -- and self-styled luckiest man on earth -- just announced some very happy news: he just got engaged to his future wife! Congratulations, Drew! (Drew proposed the traditional way, on a lovely European vacation. But if he'd just held off a couple of days he could have proposed via towel-clad...

The Balanced Incomplete Block Design (BIBD) is a well studied experimental design that has various desirable features from a statistical perspective. The crossdes package in R provides a way to generate a block design for some given parameters and test wheter this design satisfies the BIBD conditions. For a BIBD there are v treatments repeated r

The bottom line of this post is for you to go to: Stack Exchange Q&A site proposal: Statistical Analysis And commit yourself to using the website for asking and answering questions. (And also consider giving the contender, MetaOptimize a visit) * * * * Statistical analysis Q&A website is about to go into BETA A month ago I invited...

Romain and I wrapped up release 0.8.4 of Rcpp last Friday. However, given the time of year, it only appeared on CRAN this morning, and then only after some prodding as CRAN processing is more or less closed this week and probably next. This release bu...

Romain and I wrapped up release 0.8.4 of Rcpp last Friday. However, given the time of year, it only appeared on CRAN this morning, and then only after some prodding as CRAN processing is more or less closed this week and probably next. This release...

This is the last day at CiRM for our “research in pair” working on the new edition of Bayesian Core. I mostly completed the revision of the chapter on Bayesian imaging, including stuff on Markov random fields and mainly on ABC algorithms. All that remains to be done about this chapter is the processing of

As I have mentioned, I recently returned for a lovely trip to Europe. While on vacation my brilliant, beautiful, funny, and all around perfect girlfriend accepted my invitation to be my wife. Pause for shared overwhelming feeling of joy… While I am still basking in the glow of being the luckiest man on Earth, as

We're nearing completion of the package of statistical tools for very large data sets that I gave an early preview of at R/Finance 2010. It will be released for Revolution R Enterprise later this year, but we're looking for some R users with big data sets to put the 1.0 version through its paces in the beta program and...

TDWI (The Data Warehousing Institute) recently published a comprehensive article about R and increasing level of activity around it from commercial organizations, including Revolution Analytics. The article opens with: In statistical circles, "R" is the name of an open source programming language for statistical analysis. These days, it might also be shorthand for "rock star." Many of the companies...

Tables of information can be included in a LaTeX beamer presentation in the same way that they would be incorporated into any other LaTeX document. The tabular environment is used and, if necessary, the tables could be numbered but this probably doesn’t make as much sense as labelling and numbering tables within an article or

The rnorm() function in R is a convenient way to simulate values from the normal distribution, characterized by a given mean and standard deviation. I hadn't previously used the associated commands dnorm() (normal density function), pnorm() (cumulative...

Revolution Analytics is a proud sponsor of this year's annual R user conference, useR! 2010, and many members of the Revolution team will be there at Gaithersburg next week. We'll be hosting a booth at the conference where you can come up and meet the team, and see some of the new features being developed for Revolution R in...

I recently e-mailed David Smith of Revolution Analytics with a few questions about their relationship with the R-project, and how they handle R‘s source code. David mentioned, and I’m flattered that my email motivated an additional page on the Revolution website. Beyond this, I have no other relationship with the company. I’d like to thank

Update Tuesday, September 14, 2010: Fixed the ylim issue, now it sets the y axis limit based on the smallest observed p-value. A while back Will showed you how to create QQ plots of p-values in Stata and in R using the now-deprecated sma package. A bi...

Since Bayes factor approximation is one of my areas of interest, I was intrigued by Xiao-Li Meng’s comments during my poster in Benidorm that I was using the “wrong” bridge sampling estimator when trying to bridge two models of different dimensions, based on the completion (for and missing from the first model) When revising the

I’d like to announce a new project by Offensive Politics called House Data, launching today. House Data is a large-scale extract of FEC Form 3 Summary of receipts of disbursements (pdf warning) of every US House campaign from mid-2001 onward. The traditional source for campaign finance summaries is the Candidate Summary File, which is a

Revolution CEO Norman Nie just recorded a live podcast with Terry Sweeney of Internet Evolution Radio. In the 30-minute interview, Norman talked about the history of R, his time with SPSS, development plans for Revolution R, and how predictive analytics is impacting businesses, the Web, and even political opinion. You can hear the recorded interview at the link below....