The 2010 ggplot2 Case Study Competition Winners have been announced! Congratulations to the winners!Grand Prize: David Kahle, Rice UniversityFinalist: Michael Lavine, UMass Amherst Finalist: Claudia Beleites, TU Dresden & Uni....
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2010 ggplot2 Case Study Competition Winners
The 2010 ggplot2 Case Study Competition Winners have been announced! Congratulations to the winners!Grand Prize: David Kahle, Rice UniversityFinalist: Michael Lavine, UMass Amherst Finalist: Claudia Beleites, TU Dresden & Uni....
Accuracy in Inventories and Nightlights Part II
In part 1 we discussed UHI in a general way and introduced NASA’s use of nightlights to identify Rural, periurban and Urban stations. Very simply, the latitude and longitude data in the station inventory is used to look up at radiance value in the nightlights file. If that value is 10 or less, the site 
Nightlights: First Principles
With the publication of Hansen2010 forthcoming it is critical to examine the subject afresh. The global temperature index product from NASA is known as GISSTEMP .GISSTEMP, like the temperature index from Hadley/CRU and NCDC attempts to estimate the average temperature of the globe using historical data archived in the GHCN ( Global Climate Historical Network) 
Nightlights: cool data, bad geocoding
A global source of population density has been on my low-priority wish list for some time, so I was very excited when I found Steve Mosher’s work with the Nighlights data set. “Nightlights” refers to the artificial lights seen from space at night. Astronomers call it “light pollution” which is pretty accurate since it’s decidedly 
Which parents are satisfied with their child’s education? Those who know their class representative well. Especially in poor schools.
Another result from our OSI / ESP survey of nearly 11000 parents in ten countries. Dots are individual parents.The y-axis is individual parents' overall satisfaction with their children's education. Red dots are parents who know the...
Kuwait Airport
Kuwait International airport. Giss has it as nightlights =0, so do I. By looking at comparisons of nightlights with the station centered and a static google map with the station centered, there are mismatches between GISS and Me and between Nightlights and the world. Subtle shift here and there. Annoying. Also, you can see 
Nightlights, Contours, and Rgooglemap
I am continuing the investigation of nightlights using some additional packages from Cran. Here we add Rgooglemaps to the mix. Rgooglemaps is a neat tool that gives you a simple ( needs better docs) interface to the static map server. Perhaps, I’ll modify the code to my likeing, so For now I use it as 
Lists of English Words
When I was a kid, I went through an 80s music phase…well, some things never change. “People just love to play with words…” Know that song? Anyway…
One of the biggest pains of text mining and NLP is colloquialism — language that is only appropriate in casual language and not in formal speech or writing. Words such as informal contractions...
In case you missed it: September Roundup
In case you missed them, here are some articles from August of particular interest to R users. We presented a profile of Hadley Wickham, author of many popular R packages including ggplot2 and reshape. We riffed the design of the new Twitter website into a discussion on calculating the Golden Mean with R. Several readers contributed 1-liners based on...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
