Monthly Archives: August 2010

R and Google Earth ~ comparing tuna tracks vs. Gulf of Mexico oil spill extent

August 5, 2010
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R and Google Earth ~ comparing tuna tracks vs. Gulf of Mexico oil spill extent

There is a lot of interest in how the Gulf of Mexico oil gusher will affect the ecosystem and its marine species. One such species is the Western Atlantic bluefin tuna that holds the Gulf of Mexico as one of its major spawning grounds. Recent tag data show that the location of the gusher is

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Where have all the Hacker News old-timers gone?

August 5, 2010
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Where have all the Hacker News old-timers gone?

Nostalgia ain't what it used to be. As slashdot slowly loses its relevance and digg heads for a more general audience to head off competition from Twitter, loyal readers of uber-technical news aggregator Hacker News wonder if it's heading the same way. Seems like the long-standing users aren't posting links to deep, interesting articles anymore, and are instead being...

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Internal Migration Estimation in England and Wales

August 5, 2010
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Internal Migration Estimation in England and Wales

During my MS.c. I worked on methods for combining internal migration data in England and Wales. Migration data is often represented in square tables of origin-destination flows. These are of particular interest to analysing migration patterns when they are disaggregated … Continue reading →

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New R User Group in Portland, OR

August 5, 2010
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There's another new R user group on the US West Coast, this time in Portland, Oregon. The Portland R User Group will hold their first meeting at the Lucky Labrador Brew Pub on Tuesday, August 17. If you're in the Portland/Vancouver area, come along for beeRs and conversation with other useRs in your area. Incidentally, there are so many...

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Are MLB Games Getting Longer?

August 5, 2010
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Are MLB Games Getting Longer?

On July 29, 2010, I had a flight from Denver to Cincinnati.  About an hour before boarding, I went to ESPN’s website and found a new article by Bill Simmons, a.k.a The Sports Guy (@sportsguy33 on Twitter).  The basic premise of this article is that a core group of fans is losing interest in Red

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R helps reproducible research

August 5, 2010
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While reading a paper on mutualistic networks in press at Ecology, by Jimena Dorado et al., I found the following sentence in the Materials & methods section: Correlation analyses were done using the cor.test function in the basepackage of R (…)Read the rest of this entry »

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Big data for R

August 5, 2010
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Big data for R

Revolutions Analytics recently announced their "big data" solution for R. This is great news and a lovely piece of work by the team at Revolutions. However, if you want to replicate their analysis in standard R, then you can absolutely do so and we show you how.

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Plotting texts as graphs with R and igraph

August 4, 2010
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Plotting texts as graphs with R and igraph

I’ve plotted several word association graphs for this New York Times article (1st paragraph) using R and the igraph library. #1, random method #2, circle method #3, sphere method #4, spring method #5, fruchterman-reingold method # 6, kamada-kawai method #7, graphopt method The red vertices mark cliques. Here’s the (rough) R code for plotting such

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Hacking the CISEN homicide data

August 4, 2010
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Hacking the CISEN homicide data

The director of the CISEN, the Mexican agency in charge of generating intelligence to safeguard Mexico's security, said in a presentation yesterday that the number of homicides linked to the drug war was a little over 28,000 since the start of the Calderon administration. Guillermo Valdés didn't provide the raw data so I used Engauge to digitize...

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Recent arXiv postings

August 4, 2010
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Recent arXiv postings

With too little time, too many things to do on my plate, here are some recent arXiv postings I won’t have time to comment: Adaptive Monte Carlo on multivariate binary sampling spaces. (arXiv:1008.0055v1) Mixture Decomposition of Distributions using a Decomposition of the Sample Space. (arXiv:1008.0204v1) Bayesian Model Selection for Beta Autoregressive Processes. (arXiv:1008.0121v1) Reference priors

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