1411 search results for "Regression"

ACM Data Mining Camp

November 16, 2010
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ACM Data Mining Camp

By guest blogger Joseph Rickert. I was very happy to be a part of the ACM Data Mining camp held last Saturday (November 13th) at eBay. It was a big day for discussing hot topics in data mining, Mahout, parallel SVMs etc, and also a pretty big day for R. Because Revolution Analytics was a sponsor for the camp,...

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My Day at ACM Data Mining Camp III

November 13, 2010
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My Day at ACM Data Mining Camp III

My first time at ACM Data Mining Camp was so awesome, that I was thrilled the make the trip up to San Jose for the November 2010 version. In July, I gave a talk at the Emerging Technologies for Online Learning Symposium conference with a faculty member in the Department of Statistics, at the Fairmont. The place was amazing,...

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Also in Bosnia & Herzegovina, satisfied parents are those who believe their school representatives are effective

November 11, 2010
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In the mixed effects regression for all 10 countries in the research I mentioned previously on this blog http://stevepowell99.posterous.com/which-parents-are-satisfied-with-their-childs, while school mean of "parents believing their represen...

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Also in Bosnia & Herzegovina, satisfied parents are those who believe their school representatives are effective

November 11, 2010
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In the mixed effects regression for all 10 countries in the research I mentioned previously on this blog http://stevepowell99.posterous.com/which-parents-are-satisfied-with-their-childs, while school mean of “parents believing their representatives are effective” was significantly positively related to their overall satisfaction with education, this effect was dwarfed by the contribution of this variable at individual level, even when allowing

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Using R and Hadoop to analyze VOIP data

November 8, 2010
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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 the Hadoop framework without needing to learn...

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Updating meteorological forecasts, part 1

November 7, 2010
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Updating meteorological forecasts, part 1

As Mark Twain said "the art of prophecy is very difficult, especially about the future" (well, actually I am not sure Mark Twain was the  first one to say so, but if you're interested by that sentence, you can look here). I have been rather su...

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Splines: opening the (black) box…

November 4, 2010
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Splines: opening the (black) box…

Splines in regression is something which looks like a black box (or maybe like some dishes you get when you travel away from home: it tastes good, but you don't what's inside... even if you might have some clues, you never know for sure*). With spl...

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My residuals look weird… aren’t they ?

November 3, 2010
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My residuals look weird… aren’t they ?

Since I got the same question twice, let us look at it quickly....  Some students show me a graph (from a Poisson regression) which looks like that,and they asked "isn't it weird ?", i.e."residuals are null or positive... this is not what we...

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R is Hot: Part 4

October 28, 2010
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This is Part 4 of a five-part article series, with new parts published each Thursday. You can download the complete article from the Revolution Analytics website. High Quality Graphics, Made Easy R is especially useful for generating charts and graphics, quickly and easily. The ability to create visual plots of complex data is more than just a handy trick;...

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Bayesian Model Averaging (BMA) with uncertain Spatial Effects

October 27, 2010
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Bayesian Model Averaging (BMA) with uncertain Spatial Effects

This file illustrates the computer code to use spatial filtering in the context of Bayesian Model Averaging (BMA). For more details and in case you use the code please cite Crespo Cuaresma and Feldkircher (2010). In addition, this tutorial exists as ...

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