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While we were out over the holiday break, Silicon Angle selected five open-source startups that are commercializing and contributing to open source projects as "Startups to Watch in 2012". Revolution Analytics was #2 on the list: This was a busy year for Revolution. The company released Revolution R 5.0, which included Hadoop integration, ... [Read more...]

In this post I promised to show how I use Python with the BeautifulSoup and Mechanize modules to scrape information from different websites. As a fun exercise, and something that should interest the readers of R-bloggers, I thought it would be interest... [Read more...]

Here is a quick demo of some of the new functionality in AQP as of version 0.99-9.2. The demos below are based on soil profiles from an archive described in (Carre and Girard, 2002) available on the OSACA page. A condensed version of the collection is ... [Read more...]

Summary/TL;DR Either the first precincts to report were widely unrepresentative of Iowa as a whole, or something screwy happened. Background Yesterday was the first primary for the 2012 U.S. presidential elections. When I logged off the internet last night, the results in Iowa showed a dead heat between ... [Read more...]

Introduction On Tuesday January 3rd 2012 the Iowa Republican party held it’s presidential caucuses, with Mitt Romney beating Rick Santorum by 8 votes as of noon on Jan 4th. This was an exciting race with multiple lead changes and entrance polling showing many late undecideds and large gaps in candidate support ... [Read more...]

I wanted to write a quick post about a useful linux tool for using R. I sometimes have long running R sessions for model training. One solution that I have alluded to is to call your script with Rscript. The nohup command in linux with push this to the... [Read more...]

New York Journalism Data Camp in February: ScraperWiki’s first US two dayJournalism Data Camp event in conjunction with the Tow Center for Digital Journalism at Columbia University and supported by the Knight Foundation on February 3rd and 4th 2012. [Read more...]

I came across a nice problem at project euler that gave me sense of satisfaction that was unusual, I think that because I don't usually get the solutions right the first time as I did in this case. Anyhow, I shall try and decode the R codes that I... [Read more...]

I received the following email about Introducing Monte Carlo Methods with R a few days ago: Hallo Dr. Robert, I  am studying your fine book for myself. There´s a little problem in examples 7.17 and 8.1: in the R code a function “gu” is used and a reference given to ex. 5.17, ... [Read more...]

Around Christmas time I presented my first impressions of Kruschke’s Doing Bayesian Data Analysis. This is a very nice book but one of its drawbacks was that part of the code used BUGS, which left mac users like me stuck. … Continue reading → [Read more...]

Introduction First day back to work after New Year celebrations and my brain doesn’t really want to think too much. So I went out for lunch and had a nice walk in the park. Still had 15 minutes to kill before my lunch break was over and so decided to ... [Read more...]

useR! 2012 has issued a call for abstracts! I've extended the WebSweave concept to offer a tool to create simple abstracts online, including those with markup, which may then be submitted at the conference website. Use the following link for the Simple Abstract Helper. [Read more...]

In the desperate effort of understanding the secret of life it may be too simplistic to just count the differences between two strings of equal length. You might as well want to know where they differ. You can do that recycling most of the function published in a previous post. ... [Read more...]

By Joseph Rickert Even to the practiced eye, looking at coefficients in R model summaries can be tedious. And, capturing information about the significance of coefficients from scores or maybe even hundreds of models in a way that makes writing the final report a bit easier is a time consuming ... [Read more...]

In the 108. issue of Linux User & Developer was an article “Supercharge your R experience” about using parallel techniques to analyse large amounts of data with R. 4 page step-by-step tutorial shows the basics needed for installing needed packages … Continue reading → [Read more...]

Jeff recently posted links to data from cities and states. He and I wrote R code that plots gun offender locations for Baltimore. Specifically we plot the locations that appear on this table. I added locations of the Baltimore neighborhoods where most ... [Read more...]

Buying the special issue of La Recherche on “La révolution des mathématiques”, I discovered that this is the Alan Turing Year in celebration of the 100th anniversary of Turing‘s birth. The math department at the University of Leeds has a webpage on all the events connected with ... [Read more...]

2011 was a volatile year, no doubt about that, but was it exceptionally so from a historic point of view? To quantify the volatility, I used the Dow Jones Industrial average, which goes back to 1928 on Yahoo Finance: A volatile year no doubt, but once again confirming the fact that, in ... [Read more...]