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There is a certain hype about mixed (and random) effects among statistician and analysts. You can show some love to Douglas Bates and Martin Maechler for maintaing the lme4 package for our cupid, R I copy the entity of the information of the projects page. Doxygen documentation of the underlying ... [Read more...]

Following my three-fold R exam of last month, I had a depressing afternoon meeting (with other faculty members) some students who had submitted R codes that were suspiciously close to other submitted R codes… In other words, it looked very  likely they had cheated. (A long-term issue with my R ... [Read more...]

When Lehman Brothers, Bear Stearns and Merrill Lynch went kablooie in the financial crisis, what happened to all their employees? Thanks to the magic of LinkedIn data, their Chief Scientist DJ Patil can answer that question: they went to the surviving banks: It's a great, if tantalizingly incomplete visualization -- ... [Read more...]

At last night's meeting of the ACM Student Chapter at the University of Chicago, DIrk Eddelbuettel gave an invited guest lecture, "Programming with Data: Using and Extending R". I wasn't there myself, but Dirk has already posted his slides, and they're a treat. After a backgrounder on R itself (BTW, ... [Read more...]

That headline's right up there with "Dog Bites Man" for shock value, but the Daily Express in the UK isn't one to let mere probability stand in the way of a sensational headline like "Mum beats odds of 50 million to one to have 3 babies on same date". As Ben Goldacre ... [Read more...]

Fellow GSoC mentor and local ACM masterminder Borja Sotomayor had invited me a few months ago to give a talk at the ACM chapter at the University of Chicago. Today was the day, and the slides from the 50-minutes talk on R and extending R with Rcpp ar... [Read more...]

As you can see there is only a slight positive correlation between the corruption index of the Mexican chapter of Transparency International and the percentage of students who cheated on the Grade 6 ENLACE test*. What I find surprising is that there is... [Read more...]

Upon request by the blog administrator, Tal Galili, I have joined R-bloggers, which aggregate blog entries about R into a central place. I feel I have much more to learn than to teach about R (as can be seen from earlier comments on my R programs in Introducing Monte Carlo ... [Read more...]

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We've just upgraded REvolution R Enterprise to version 3.1 and expanded the available platforms to include 64-bit Windows. (REvolution R Enterprise is our subscription-based distribution of R.) This means that you can now create R programs on Windows that use all of your available memory, instead of being constrained by the 3... [Read more...]

We're proud to announce that Tex Hull, who together with REvolution CEO Norman Nie created the first version of SPSS, has joined the REvolution team. Tex will be working with Norman and our CTO David Champagne to take REvolution R Enterprise to the next level, specifically to improve its scalability ... [Read more...]

Last spring I read “Quantitative Trading” by Ernest P. Chan. In his book, he suggested to buy gas futures contract at the end of February and sell it later, in March. Today, I decided to test this strategy by using R-language. The most important thing for such investigation is data. ... [Read more...]

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Intelligent Enterprise has announced its 2010 "Editors Choice" Awards, and the R project is included as one of twelve "Companies to Watch" in the Business Intelligence category. R Project is an open-source statistical programming environment that is winning broad praise and accelerating uptake as a language for in-database analytics. The likes ... [Read more...]

Stop wasting time reading my drivel. You need to head over the the DataWrangling.com blog and read Peter Skomoroch’s interview with Bradford Cross of FlightCaster. Peter wrote up this interview back in August 2009, so I’m a little late to this party. There’s some really great quotes ... [Read more...]

hash-2.0.0 has been released please read about it here: Earlier today, hash-1.99.x was released to CRAN. This is a stable release and adds some more functions to an already full-featured hash implementation. This version fixes some bugs, adds some features, improves performance and stability. You can read about the ... [Read more...]

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