My no loops in R hair shirt

July 27, 2012 | Derek-Jones

Being professional involved with analyzing source code I get to work with a much larger number of programming languages than most people. There is a huge difference between knowing the intricate details of the semantics of a language and being able to fluently program in a language like a native ... [Read more...]

integrating R with other systems

June 16, 2012 | Harlan

I just returned from the useR! 2012 conference for developers and users of R. One of the common themes to many of the presentations was integration of R-based statistical systems with other systems, be they other programming languages, web systems, or enterprise data systems. Some highlights for me were an update ... [Read more...]

hacking .gov shortened links

July 30, 2011 | Harlan

This past Friday, the web portal to the US Federal government,, organized hackathons across the US for programmers and data scientists to work with and analyze the data from their link-shortening service. It turns out that if you shorten a web link with, the shortened link ... [Read more...]

making meat shares more efficient with R and Symphony

May 9, 2011 | Harlan

In my previous post, I motivated a web application that would allow small-scale sustainable meat producers to sell directly to consumers using a meat share approach, using constrained optimization techniques to maximize utility for everyone involved. In this post, I’ll walk through some R code that I wrote to ... [Read more...]

Prediction with Multilevel Regression Models, and Pizza

October 15, 2010 | Harlan

The Meetup phenomenon, which is now substantial and longstanding enough to be more of a cultural change than a flash in the pan, continues to impress me. Even more so than tools like LinkedIn, Meetups have changed the nature of professional networking, making it more informal, diverse, and decentralized. Last ... [Read more...]

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