Monthly Archives: April 2010

Quick and dirty parallel processing in R

April 30, 2010
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Quick and dirty parallel processing in R

R has some powerful tools for parallel processing, which I discovered while searching for ways to fully utilize my 8-core computer at work. What surprised me is how easy it is…about 6 lines of code, if that. Given that I wasn’t allowed to install heavy duty parallel-processing systems like MPICH on the computer, I found

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How many girls, how many boys?

April 30, 2010
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How many girls, how many boys?

I found this interesting question over here at mathoverflow.net. Here’s the question: If you have a country where every family will continue to have children until they get a boy, then they will stop. What is the proportion of boys to girls in the country. First off, there are some assumptions you need to make that aren’t

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Which font uses the most ink?

April 30, 2010
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Which font uses the most ink?

If you're being particularly cost-conscious about your use of printer ink or toner, you may be wondering which font you should choose to minimize ink use. Here's an infographic with the answer: This is an interesting infographic in its own right, but what makes it cool is that these are not photoshopped images of Bic biros. Matt Robinson created...

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Data Manipulation with R – Spector (2008)

April 30, 2010
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Data Manipulation with R – Spector (2008)

Title: Data Manipulation with RAuthor(s): Phil SpectorPublisher/Date: Springer/2008Statistics level: N/A Programming level: Intermediate Overall recommendation: Highly recommended If there is one book that every beginning R user coming from a programming background should have, it is Spector’s Data Manipulation with R. New R users with analytic backgrounds and experience with software packages such as SAS The post Data...

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Data Manipulation with R – Spector (2008)

April 30, 2010
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Title: Data Manipulation with RAuthor(s): Phil SpectorPublisher/Date: Springer/2008Statistics level: N/A Programming level: Intermediate Overall recommendation: Highly recommended If there is one book that every beginning R user coming from a program...

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hash-2.0.0

April 30, 2010
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hash-2.0.0

Come see my talk on hashes in R at useR! 2010. (http://user2010.org/) July 20-23 National Institute of Standards and Technology (NIST), Gaithersburg, Maryland, USA

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5 Minute Analysis in R: Case-Shiller Indices

April 29, 2010
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5 Minute Analysis in R: Case-Shiller Indices

The Case-Shiller Home Price Indices measure residential home values for 20 cities in the US, with some indices going all the way back to the 80s. With housing prices all the rage these days, we should perform a quick-and-dirty analysis using R to see what we can glean from this rich dataset. First things

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Research in pair next summer

April 29, 2010
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Research in pair next summer

Today I received the very good news that our proposal with Jean-Michel Marin to undertake “research in pair” in CIRM, Luminy, a fortnight next summer was accepted! This research centre in Mathematics is a southern and French version of the renowned German centre of Oberwolfach and, while I would have prefered the cool Black Forest

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UAH Channel 5 Anomaly Trends

April 29, 2010
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UAH Channel 5 Anomaly Trends

Lucia at The Blackboard has on on-going bet where readers submit predictions of the monthly UAH anomaly, the April bet post is here. Lucia does some very interesting climate analysis, some of her charts, however,  can give me a headache … Contin...

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Getting a Web application to talk to R

April 29, 2010
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Let's face it: you can do some pretty awesome things with R -- statistical models, beautiful charts, you name it -- but if the only way to do those things is from the R command line you're limiting the audience of people who might make use of all this awesomeness to a limited subset: R programmers. What if you...

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