October 2010

The BMS Add-ons Section

October 18, 2010 | BMS Add-ons » BMS Add-ons

This section will be updated irregularly with pages on applications of BMS. It intends to concentrate on two things: Some add-on code to extend the functionality of BMS in a certain direction, such as e.g. BMA and spatial filtering Usage of BMS to re... [Read more...]

American TV does cointegration

October 18, 2010 | Pat

Fringe provides an excellent example of cointegration.  This is a television show in which there are two adjacent universes.  The universes are almost alike but not exactly. Now, everyone knows that history is chaotic.  If a butterfly does an extra flap of its wings, then that difference spreads out to ...
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Giss Nightlights Replicated

October 18, 2010 | Steven Mosher

UPDATE: holy open source to the rescue. I posted a question yesterday on a idea peter had. Transaprency for overlaying light maps onto google maps. reminds me of the old Quake days. Well, I know John Carmack, John is an old friend of mine, but I’m no John Carmack. ...
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On the Gory Loops in R

October 17, 2010 | Yihui Xie

his blog post is mainly for Stat 579 students on the homework for week 7, since I received too many “gory” loops in the homework submissions and I think it would help a bit to write my thoughts on R loops for beginners. The immortal motto for newbies in programming is: If ... [Read more...]

Le Monde puzzle [41]

October 17, 2010 | xi'an

The current puzzle in Le Monde this week is again about prime numbers: The control key on a credit card is an integer η(a) associated with the card number a such that, if the card number is c=ab, its key η(c) satisfies η(c)=η(a)+η(b)-1. There is only ... [Read more...]

RPostgreSQL 0.1-7

October 17, 2010 | Thinking inside the box

After a somewhat long hiatus, RPostgreSQL version 0.1-7 has now been released to CRAN. RPostgreSQL connects R to PostgreSQL database systems using the standard DBI interface. This version fixes a number of issues that had been compiled in the issu... [Read more...]

Boundary conditions Dominate

October 16, 2010 | Steven Mosher

In part 1 and part 2 we went over the background of nightlights and the fundamental problem: Station inventory data had errors in it: In Hansen 2010, Hansen writes: “ Station location in the meteorological data records is provided with a resolution of 0.01 degrees of latitude and longitude, corresponding to a distance of about 1 [...]
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2010 ggplot2 Case Study Competition Winners

October 16, 2010 | C

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.... [Read more...]

Accuracy in Inventories and Nightlights Part II

October 16, 2010 | Steven Mosher

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 ...
[Read more...]

Benoît B Mandelbrot, 1924-2010

October 16, 2010 | David Smith

Benoît Mandelbrot, the father of fractals, died Thursday at the age of 85. His obituary in the New York Times covers his life and work, and is also a well-written introduction to fractals. Mandelbrot's famous book, The Fractal Geometry of Nature, was an inspiration to me in high school: that ... [Read more...]

Cramer’s Stock Pick Recommendations Analyzed

October 16, 2010 | C

Bill Alpert of Barron’s has demonstrated the use of R in financial journalism as he criticized the performance of Jim Cramer’s stock picks.  Patrick Burns was an advisor for the analysis done in the article.  R was an important tool that allowed them to do their research as ... [Read more...]

RcppArmadillo 0.2.8

October 16, 2010 | Thinking inside the box

Version 0.2.8 of RcppArmadillo is now on CRAN. This updates the included Armadillo template library to version 0.9.90 which Conrad released two few days ago. RcppArmadillo makes it easy to write highly efficient and highly readable C++ code for line... [Read more...]

Busting gay stereotypes with data

October 15, 2010 | David Smith

As a gay guy, you sometimes have to put up with some pretty offensive stereotypes that get thrown your way by extremists in the community and the media. These stereotypes are usually deployed in the form of anecdotes about how gay people are "promiscuous" or "corrupting". These misrepresentative anecdotes have ... [Read more...]
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