Category Archives: R

R and MPI on Ohio Supercomputer Center’s Oakley cluster

A few years ago, I wrote a short guide to Using R and snow on the Ohio Supercomputer Center’s Glenn cluster. Several things have changed in the world of R since then (namely, the inclusion of the parallel package into … Continue reading

Posted in R | 1 Comment

Boolean 3 (finally) on CRAN

I have finally managed to get boolean3 accepted to CRAN. You can find it here: boolean3 on CRAN. To summarize: boolean3 provides a means of estimating partial-observability binary response models following boolean logic. boolean3 was developed by Jason W. Morgan under the … Continue reading

Posted in Data analysis, R | Leave a comment

Pearson’s r: Not a good measure of electoral persistence

Pearson’s product-moment correlation, \(r\), is an incredibly useful tool for getting some idea about how two variables are (linearly) related. But there are times when using Pearson’s \(r\) is not appropriate and, even if linearity and all other assumptions hold, … Continue reading

Posted in Data analysis, Graphics, Poland, Political parties, R | 3 Comments

R Tip: Avoid using T and F as synonyms for TRUE and FALSE

By default when you start R, T and F are defined as TRUE and FALSE. When I review other people’s code, I often see functions defined with arguments set to these values by default. This is a very bad idea. … Continue reading

Posted in Hacking, R, Tip | 1 Comment

Closures in R: A useful abstraction

People who have been using R for any length of time have probably become accustomed to passing functions as arguments to other functions. From my experience, however, people are much less likely to return functions from their own custom code. … Continue reading

Posted in R | 1 Comment

Filtering a list with the Filter higher-order function

Last week markbulling over at Drunks & Lampposts posted a method of using sapply to filter a list by a predicate. Today the @RLangTip tip of the day was to use sapply similarly. This made makes me wonder if R‘s … Continue reading

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Announcing boolean3 (beta)

After entirely too long, I am happy to announce the beta release of boolean3, an R package for modeling causal complexity. The package can be downloaded at the following links: Unix/Linux: boolean3_3.0.20.tar.gz Windows: (Please let me know if you have any … Continue reading

Posted in Code, R | 2 Comments

Three free books for better programming in R (and any other language)

Like many users and producers of R packages, I have never had any formal training in computer science. I’ve come to to the conclusion that this is a serious omission in a professional researcher’s training. Computer scientists and professional hackers … Continue reading

Posted in Hacking, R | 4 Comments

The performance cost of a for-loop, and some alternatives

I’ve recently been spending a lot of time running various simulations in R. Because I often use snow to perform simulations across several computers/cores, results typically come back in the form of a list object. Summarizing the results from a list … Continue reading

Posted in R | 10 Comments

Code: mtable-ext updated

I have fixed a small bug in mtable-ext that prevented asterisks from being printed for negative coefficients in mixed effects models output by lme4. Thanks to Reinhold Kliegl and Martin Elff for pointing out the bug and for providing the … Continue reading

Posted in Code, LaTeX, R | 1 Comment