HRSA Area Resource File Format 2009

February 23, 2011 | Matt Shotwell

From the HRSA website: [The ARF 2009] is a database containing more than 6,000 variables for each of the nation’s counties. ARF contains information on health facilities, health professions, measures of resource scarcity, health status, economic activity, health training programs, and socioeconomic and environmental characteristics. The data file itself is formatted ... [Read more...]

Dataset: Wisconsin Union Protester Tweets #wiunion

February 21, 2011 | mjbommar

   I’ve been playing with Twitter data over the last week, archiving Algerian, Egyptian, Iranian, and Chinese tweets.  I thought I’d bring the story a little closer to home this time by archiving tweets from Wisconsin Union protesters on the … Continue reading → [Read more...]

Dataset: Tweets from the Chinese Protests #cn220

February 20, 2011 | mjbommar

  Earlier this week, I posted a ~100k tweet dataset on the #25bahman protests in Iran.  The corresponding figure of frequencies showed a strong presence on Twitter, with over 500 tweets per 5 minute period at peak.  You can download the … Continue reading → [Read more...]

R Bloggers: The Site I Wish Existed in 2007

February 19, 2011 | mjbommar

  My first experience with R was in 2007 as a sophomore in undergrad.  As part of a larger project on pricing day-ahead electricity futures, I wanted to cluster locational marginal price (LMP) data from the ISO-NE.  Something like k-means is easy … Continue reading → [Read more...]

Consuming RdotNET

February 17, 2011 | JeroldHaas

In my explorations with R, Mathematica, FreeMat, MatLab, and RapidMiner (now with R support! Yay!), I’m seeing integration of R to be quite useful in building a trading app, as technical analysis is one of R’s fortés. For the sake of brevity, I’...
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Pre-processing text: R/tm vs. python/NLTK

February 16, 2011 | mjbommar

  Let’s say that you want to take a set of documents and apply a computational linguistic technique.  If your method is based on the bag-of-words model, you probably need to pre-process these documents first by segmenting, tokenizing, stripping, stopwording, and … Continue reading → [Read more...]

Introductory R Books

January 31, 2011 | Daniel Hocking

Here's a link to another blog compiling information and recommendations are introductory books on R (not statistics books that use R).  I thought this might be useful for people.
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R programming books (updated)

January 28, 2011 | csgillespie

In a recent post, I asked for suggestions for introductory R computing books. In particular, I was looking for books that: Assume no prior knowledge of programming. Assume very little knowledge of statistics. For example, no regression. Are cheap, since they are for undergraduate students. Some of my cons aren’... [Read more...]

R GUIs, IDEs, and text editors

January 18, 2011 | Daniel Hocking

When deciding what program to write your R code in it is important to consider a number of factors so you can keep organized and work efficiently.  I found this article useful for getting started.  Text editors include syntax highlightin...
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The Automatic Millionaire & Amortization

January 8, 2011 | Matt Shotwell

Dan Byrne of Vanderbilt University gave me a book back in October titled The Automatic Millionaire by David Bach. The book is an easy read and full of sound advice that I intend to take. Bach espouses a plan for retirement built on the principles of “paying yourself first” (i....
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web content anlayzer

January 6, 2011 | Martin Scharm

Just developed a small crawler to check my online content at in terms of W3C validity and the availability of external links. Here is the code and some statistics... [Read more...]

Book Review: R in a Nutshell

December 29, 2010 | Luke Miller

A brief review of R in a Nutshell by Joseph Adler. This book continues to serve as a useful reference that sits on my desk next to my computer, waiting to tell me the name of that command I've just forgotten. [Read more...]

one-dimensional integrals

December 25, 2010 | R on Guangchuang Yu

The foundamental idea of numerical integration is to estimate the area of the region in the xy-plane bounded by the graph of function f(x). The integral was esimated by divide x to small intervals, then add all the small approximations to give a total approximation. Read More: 468 Words Totally [Read more...]

R programming books

December 21, 2010 | csgillespie

My sabbatical is rapidly coming to an end, and I have to start thinking more and more about teaching. Glancing over my module description for the introductory computational statistics course I teach, I noticed that it’s a bit light on recommend/background reading. In fact it has only two ... [Read more...]
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