Blog Archives

Competition: Predicting traffic

July 8, 2010
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Here's an interesting competition that may well lend itself to R: the IEEE International Conference on Data Mining is running a contest to find the best way of predicting traffic problems. There are three separate contests: Predicting congestion: a series of measurements from 10 selected road segments is given and the goal is to make short-term predictions of future...

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R/Finance 2010 presentations

July 7, 2010
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The presentations from April's successful R/Finance 2010 conference in Chicago are now available online. (Revolution Analytics is a proud sponsor of the conference.) There's some amazing content here for anyone looking for the cutting-edge of financial engineering, with presentations from practitioners and researchers at institutions like Invesco Asset Management, Black Mesa Capital, and some of the leading academic institutions...

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Ross Ihaka in Sunday Star Times

July 6, 2010
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Ross Ihaka in Sunday Star Times

New Zealand's Sunday Star Times last weekend featured a profile on Ross Ihaka, co-creator of R: The down-to-earth associate statistics professor and his fellow researcher Robert Gentleman are famous around the world for developing R programming – a "glorified calculator" that crunches data. R programming allows for statistical computing and graphics and is used by thousands of companies worldwide...

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New versions of plyr, ggplot2 released

July 6, 2010
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Hadley Wickham has announced that new versions of his popular grammar-of-graphics charting package ggplot2 and his general-purpose data reshaping tool plyr for R are now available. plyr boasts several new features, most notably a new join function which should simplify what can sometimes be a difficult process in R: merging two data sets. A simplified SQL-like terminology should make...

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The case of the missing zeroes

July 2, 2010
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The case of the missing zeroes

Political polling is a big industry these days, especially here in the US, and both mainstream news outlets and many of the bigger political blogs commission their own polls to measure (for example) the popularity of a sitting or candidate politician or policy. In the last week though, a very public spat has erupted between the left-leaning political blog...

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UseR! 2010 registration extended until July 4

July 1, 2010
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Registration for the worldwide R user conference, useR! 2010, closed on June 20. But it seems like a few folks weren't aware of the early deadline, and missed out on registering. Never fear! Due to overwhelming demand, registration has re-opened until midnight on July 4. You'll need to hurry -- there are only 30 spots left -- so get...

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June 2010 edition of R Journal available

June 30, 2010
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The latest edition of the R Journal is now available. This issue includes in-depth articles on the packages IsoGene, glmmBUGS, cshapes, tmvtnorm, neuralnet, glmperm and exactci/exact2x2, plus an example of reproducible research in R. There's also a review of the book A Beginner's Guide to R. The complete edition is available for download in PDF format at the link...

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Tips for managing memory in R

June 29, 2010
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Tips for managing memory in R

R is an in-memory application, so every new object you create takes up RAM. (Yes, there are ways around that, but that's a topic for another article.) If you're working on a small machine (say, a 32-bit Windows system with 1Gb of RAM or less) you might need to be careful with the object you create. This StackOverflow question...

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How to peg 7 cores with doSMP

June 28, 2010
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How to peg 7 cores with doSMP

Statistics PhD student Nathan VanHoudnos has an 8-core laptop, and by his own admission, takes "an almost unhealthy pleasure in pushing computer to its limits". It seems like he's found an outlet for this passion with the new doSMP library included with Revolution R, that allows him to use all his processors for some gnarly simulations in R:...

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Because it’s Friday: Insect sex

June 25, 2010
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Birds do it, bees do it. But the bees and their insect brethren definitely do it in a more interesting way. Don't believe me? Check out Isabella Rosselini's description of bee sex and the other videos in her educational "Green Porno" series. It's fascinating stuff. For some light summer reading, I also recommend Olivia Judson's "Dr. Tatiana's Sex Advice...

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