1487 search results for "regression"

Recent developments in the drug war

December 1, 2010
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Recent developments in the drug war

The Mexican government recently released data on all crime statistics from January 1997 to October 2010, as reported by the various police forces operating in Mexico. This information provides an unprecedented look at what has happened since the drug war began and allows for a frank assessment of the deterioration of security in Mexico.

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Initializing the Holt-Winters method

November 29, 2010
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Initializing the Holt-Winters method

The Holt-Winters method is a popular and effective approach to forecasting seasonal time series. But different implementations will give different forecasts, depending on how the method is initialized and how the smoothing parameters are selected. In this post I will discuss various initialization methods. Suppose the time series is denoted by and the seasonal period

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Statistique de l’assurance STT6705V, partie 11

November 29, 2010
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Statistique de l’assurance STT6705V, partie 11

Last course will be uploaded soon (the links will be here and there). The R code considered is given below. First, we had to work a little bit on the datasets, tabB=read.table("http://perso.univ-rennes1.fr/arthur.charpentier/tabB.csv", sep=";",head...

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Were stock returns really better in 2007 than 2008?

November 22, 2010
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Were stock returns really better in 2007 than 2008?

We know that the S&P 500 was up a little in 2007 and down a lot in 2008.  So on the surface the question seems really stupid.  But randomness played a part.  Let’s have a go at deciding how much of a part. Figure 1: Comparison of 2007 and 2008 for the S&P 500. Statistical … Continue reading...

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Finally! A practical R book on Data Mining: "Data Mining With R, Learning with Case Studies," by Luis Torgo

November 19, 2010
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Finally! A practical R book on Data Mining:  "Data Mining With R, Learning with Case Studies," by Luis Torgo

I've been a bit busy lately with a few big things, however, I wanted to stop by and mention a fantastic book for those who have been following along the R examples.  Anyone who's followed my blog knows that I'm big on practical books with examples...

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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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