Monthly Archives: August 2010

A small and lonely sea urchin…

August 22, 2010
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A small and lonely sea urchin…

A few weeks ago, a paper on which I am a co-author was accepted for publication in the french ecological journal Life & Environment. In this paper, we evaluate the consequences of recreative harvesting on three populations of sea urchins (…)Read the rest of this entry »

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Newcomb, Benford, and their Dirty, Dirty Logarithms

August 22, 2010
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Newcomb, Benford, and their Dirty, Dirty Logarithms

Tom Taverner introduced me to Benford’s Law as we were eating lunch together at a statistical computing conference: If you look at the first digits of data in many naturally-occuring datasets, a startling 30 percent of them are ones. “Pah!” I said. “That belies intuition! Why would one digit occur any more than another? I’d

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Traffic prediction contest closing soon

August 22, 2010
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A quick reminder that the IEEE traffic-prediction competition closes soon. If you're thinking of entering you'll need to get the description of your R-based solution in by September 13. IEEE ICDM Contest: Road Traffic Prediction for Intelligent GPS Navigation

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Global Temperature Proxy Reconstructions ~ Bayesian extrapolation of warming w/ rjags

August 22, 2010
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Global Temperature Proxy Reconstructions ~ Bayesian extrapolation of warming w/ rjags

Update: fixed projection. There are a bunch of “hockey sticks” that calculate past global temps. through the use of proxies when instrumental data is absent. There is a new one out there by McShane and Wyner (2010) that’s creating quite a stir in the blogosphere (here, here, here, here). The main take out being, that

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Dump R datasets into a single file

August 21, 2010
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Dump R datasets into a single file

Should you need datasets that come with R and additional packages (you can access them via data()) in one single file, here’s what I did to dump the entire workspace into one file: This code can easily be adapted to dump individual dataset into its own file.

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Using R for Introductory Statistics, Chapter 3.4

August 21, 2010
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Using R for Introductory Statistics, Chapter 3.4

...a continuing journey through Using R for Introductory Statistics, by John Verzani. Simple linear regression Linear regression is a kooky term for fitting a line to some data. This odd bit of terminology can be blamed on Sir Francis Galton, a proli...

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Map of Upcoming Ruby Conferences

August 21, 2010
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Map of Upcoming Ruby Conferences

One of the top searches on rubyflow is “conference”.  A recent post showed how to create a map with the location of the 2010 R User Conference.  So why not expand on the subject and create a map with numerous conference locations thr...

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Managing Market Studies in R

August 21, 2010
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Managing Market Studies in R

I'm currently working on seasonal studies for various markets and have decided it's high time I got an organized workflow established. How does sugar behave in August every year? Is it random or are there some fundamental drivers that coerce its behavi...

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swing graph

August 21, 2010
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I’m updating a swing dotplot PDF every 10 minutes as the count progresses (and the cool part is that the updates continue even as I’m flying Heathrow to SFO).

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Weekend art in R (Part 3)

August 21, 2010
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Weekend art in R (Part 3)

I have a few posts nearing completion, but meanwhile a weekend break for art. Big thanks to Simon Urbanek and Jeffrey Horner, creators of Cairo, a library for the programming language R. Have you noticed how R can’t anti-alias (fancy way for saying smooth out lines and curves when creating a bit-mapped image)? Cairo can.

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