November 2010

Promote your favorite R functions

November 9, 2010 | David Smith

The 27 base and recommended libraries of the standard R 2.12 distribution together contain 3556 functions (you can check using the code posted after the jump). Many of the functions are commonly used: c, data.frame, rnorm, lm. But some of those functions, while being extremely useful, may be less well known to ... [Read more...]

New R User Group in Houston

November 9, 2010 | David Smith

The latest local R user group to form is located in Houston, Texas. The first meeting of the Houston R Users Group is tonight at Rice University (in conjunction with the Houston chapter of the ASA). R hackr (typo intended!) Hadley Wickham will be giving a presentation on writing R ... [Read more...]

Mapping drug war related homicides in 2010

November 9, 2010 | Diego Valle-Jones

There have been some very good visualizations of the Wikileaks data so I decided to create one of the drug war in Mexico The above map was made using data collected by Walter McKay, mainly from El Universal and El Diario reports. The data is stored as a Google Map ... [Read more...]

The ARORA guessing game

November 9, 2010 | Pat

The game ARORA (A random or real array) is a website that gives you two time series at a time. Your job is to guess which series is real market data and which is permuted data.  It’s fun — try it. With some practice you will probably be able to ... [Read more...]

Computational position in Texas

November 8, 2010 | xi'an

José Bernardo forwaded this announcement that sounds quite attractive (conditional upon living in a remote part of Texas!) Senior Faculty Position in Computational Statistics At Texas A&M University As part of a recognition of the increasing importance in the modeling and computational sciences, the Department of Statistics at Texas ... [Read more...]

Using R and Hadoop to analyze VOIP data

November 8, 2010 | David Smith

Last month, the newest member of Revolution's engineering team, Saptarshi Guha, gave a presentation at Hadoop World 2010 on using R and Hadoop to analyze 1.3 billion voice-over-IP packets to identify calls and measure call quality. Saptarshi, of course, is the author of RHIPE, which lets R programmers write map-reduce algorithms in ... [Read more...]

The Dataists answer your questions

November 8, 2010 | David Smith

The fine bloggers (and R experts) at the Dataists have volunteered to answer questions about data analysis on Reddit: A few months ago, a group of likeminded folks in New York and the San Francisco Bay area decided it was time to start a blog about data, and we can ... [Read more...]

Example 8.13: Bike ride plot, part 2

November 8, 2010 | Ken Kleinman

Before explaining how to make and interpret the plot above, Nick and I want to make a plea for questions--it's hard to come up with useful questions to explore each week!As shown in Example 8.12, data from the Cyclemeter app can be used to make interes...
[Read more...]

The NYC Marathon

November 8, 2010 | John Myles White

New York’s annual marathon took place yesterday. Watching a bit of it on television with my friends, I was struck by the much earlier starting time for women than men. Specifically, professional women started running yesterday at 9:10 AM, while professional men start running at 9:40 AM. (This information comes from ... [Read more...]

A R wrapper for Google Prediction API

November 8, 2010 | Paolo Sonego

Since I got the chance to access to both Google Storage for Developers and Google Prediction API (more details here and here), I decided to create a simple wrapper (just 4 basic functions until now) to be capable to play with the Google Prediction API ...
[Read more...]

Le Monde puzzle [43]

November 7, 2010 | xi'an

Here is the puzzle in Le Monde I missed last week: Given a country with 6 airports and a local company with three destinations from each of the six airports, is it possible to find a circular trip with three intermediate stops from one of the airports? From all of the ... [Read more...]

Wetbulb Temperature

November 7, 2010 | Steven Mosher

This google map display is just one of 230 GHCN stations that is located in the water. After finding  instances of this phenomena over and over, it seemed an easy thing to find and analyze all such cases in GHCN. The issue matters for a two reasons: In my temperature analysis ... [Read more...]

Installing R packages

November 6, 2010 | csgillespie

Part of the reason R has become so popular is the vast array of packages available at the cran and bioconductor repositories. In the last few years, the number of packages has grown exponentially! This is a short post giving steps on how to actually install R packages. Let’s ... [Read more...]

Livin’ la Vida Poisson

November 5, 2010 | Matt Asher

Yes, I did just mix English, Spanish and French. And no, I living the “fishy” life, popular opinion to the contrary. Here’s the story. As someone who spends the majority of his time working online, with no oversight, I notice that I tend to drift a lot. I don’... [Read more...]

The bms Function Explained

November 5, 2010 | BMS Add-ons » BMS Add-ons

This text 'pedagocially' explains how the bms function works code-wise and is intended for people who prefer to program customized adjustments of the bms package. bms is the workhorse function to do the sampling part of Bayesian Model Averaging in the... [Read more...]
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