Blog Archives

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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Pollution from the BP oil spill

June 25, 2010
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Pollution from the BP oil spill

There's been a lot of talk about the slicks and plumes of oil from the Deepwater Horizon disaster, but how does the presence of that oil translate into measurable pollution in the air, water, and sediment? The EPA is now releasing pollutants and making the data available for analysis. Because the data are online, it's a simple process to...

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How to: Debug in R

June 23, 2010
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Revolution Analytics is proud to sponsor the New York R User Group. The last meeting was on the theme of debugging in R, and some videos of the talks are now available at the Video Rchive. Jay Emerson have a talk on Basic debugging in R and Harlan Harris dived deeper on advanced debugging techniques. Also presenting were Peter...

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Analyzing competitive nordic skiing with R

June 22, 2010
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Analyzing competitive nordic skiing with R

Here's another great example of R being used to analyze sports data. Statistician and skier Joran Elias has started a project to analyze and visualize international cross country ski racing results, and he publishes his analysis at the blog Statistical Skier. All of the analyses are done using R (and for data, SQLite via the RSQLite package). As much...

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New blog from Rmetrics Foundation

June 21, 2010
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The Rmetrics Foundation (the sharp minds behind the Rmetrics suite of packages for financial analysis in R) have just launched a new blog where you can keep up with the latest Rmetrics news. Amongst the recent news: a ne eBook about data management of Indian financial market data, and a new interface between Rmetrics and AMPL. You can also...

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Revolution Analytics: Startup to watch

June 18, 2010
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Jack Germain of LinuxInsider interviewed Revolution CEO Norman Nie for his "Startup to Watch" column. Amongst the topics covered: the R language (Norman: "There are no statistical expressions that can not be written in R"), Revolution's recent name-change and announcement of our development roadmap, and the challenges of competing with SAS and Norman's former company, SPSS. Read the full...

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The impact of the drug war in Mexico

June 18, 2010
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The impact of the drug war in Mexico

For the last couple of years, Mexico has been in the midst of an escalating drug war, with violent crime on the upswing in many areas. But tracking the impact quantitatively is difficult: in Mexico, about 85% of crimes go unreported, and corruption leads to inaccurate reporting in some districts. Diego Valle has taken on the task of visualizing...

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The distribution of online data usage

June 16, 2010
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The distribution of online data usage

AT&T has recently announced it will no longer offer unlimited data plans for new iPhone users in the US, and now some carriers in the UK have followed suit. In each case, the providers claim that only a very small number of users actually use enough data to warrant an unlimited plan, and most users use relatively little and...

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