Blog Archives

10 reasons why a grad student should use R

July 15, 2011
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Kevin Goulding is working on a Master’s degree in Applied Economics at Montana State University, and offers 10 reasons why grad students should choose R for statistical analyses, homework problems, and thesis research: R is free, and lets grad students escape the burdens of commercial license costs. R has really good online documentation; and the community is unparalleled. The...

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Using R and Motion Charts to analyze financial data

July 15, 2011
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Using R and Motion Charts to analyze financial data

We've noted before that with the RGoogleVis package, it's easy to make motion charts in R, and create a web-based interactive chart that reflects the synchronous movements of two or three variables over time. R user Jeffrey Breen has a great new blog post showing exactly how easy it is, which is best summarized in this tweet: I wanted...

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Revolution Newsletter: July 2011

July 14, 2011
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The most recent edition of the Revolution Newsletter is out. The news section is below, and you read the full July edition (with highlights from this blog and community events) online. You can subscribe to the Revolution Newsletter to get it monthly via email. Beta Test Revolution R Enterprise 5.0. Are you running R in a Microsoft environment? Revolution...

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Paul Murrell on Incorporating Images in R Charts

July 13, 2011
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Paul Murrell on Incorporating Images in R Charts

Thanks to everyone at who attended last night's Bay Area R User Group meeting, and a special thanks to our hosts Socialize (a company that makes a mobile SDK for application developers that increases user engagement) who were very generous in letting the group use their San Francisco digs for the meeting. Reflexive thanks also go to the Revolution...

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A surprising(?) prediction about the S&P 500

July 12, 2011
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A surprising(?) prediction about the S&P 500

Financial analyst Greg Troccoli was a lone wolf when he predicted in July 2010 that “If the Index held at or above our proprietary support zone (1000.00- 950.00 region), it would eventually trade to a new historical high within 12 - 18 months (July- December 2011 timeframe)”. For reference, the S&P500 all-time high was 1565.15, and it closed...

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In case you missed it: June Roundup

July 11, 2011
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In case you missed them, here are some articles from June of particular interest to R users. Highlights of presentations from the R/Finance 2011 conference. Trulia uses R and statistical models to map local crime. Resources for data mining with R. K-means clustering on large data sets with the RevoScaleR package. Revolution Analytics' CTO David Champagne writes on real-time...

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NYT on the importance of reproducible research

July 8, 2011
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NYT on the importance of reproducible research

Yesterday's New York Times includes a great article on the failure of some genetic tests for cancer detection, and the flaws in the research that led to them. The article features quotes from Keith Baggerly of MD Anderson Cancer Center, and includes a photo of him and colleague Kevin Coombes in front of a page of R code: The...

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R 2.13.1 released

July 8, 2011
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As announced by the R core team, R 2.13.1 has been released on schedule today. For those who build R themselves, updated source code is available now; pre-built binaries will propagate through the CRAN network over the next couple of days. This update includes some minor bug fixes to graphics, fixes to some edge cases in the class systems,...

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High-quality R graphics on the Web with SVG

July 7, 2011
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High-quality R graphics on the Web with SVG

If you want the graphics you create with R to look their best, in general it's best to go for a vector-based graphics format instead of a raster-based format. Common formats like GIF and JPG are raster-based: the image is composed of pixels, and if you don't choose a high enough resolution, you're likely to lose fine details and/or...

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How Marketo uses Revolution R Enterprise

July 6, 2011
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Marketo, a leading marketing automation company, relies on data analysis to implement the features in its hosted application that help companies get the most out of their marketing dollar. We've just published a case study about how Marketo uses Revolution R Enterprise and the R language to analyze the massive data sets generated by their customers: “I use it...

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