Monthly Archives: February 2012

R 2.14.2 and R 2.15.0 coming soon

February 13, 2012
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The R core group has announced release dates for the next two versions of R (with their code names): 2.14.2 "Gift-Getting Season" on Feb 29 (3rd anniversary of R-1.0.0!) 2.15.0 "Easter Beagle" on Mar 30 R 1.0.0 was released twelve years ago on February 29, 2000; this will be the third February 29 since then. (Hence Peter Dalgaard's little...

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RStudio in the cloud, for dummies

February 13, 2012
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RStudio in the cloud, for dummies

You can have your own cloud computing version of R, complete with RStudio. Why should you? It's cool! Plus, there's a lot more power out there than you can easily get on your own hardware. And, it's R in a web page. Run it from your tablet. Run i...

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In case you missed it: January Roundup

February 13, 2012
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In case you missed them, here are some articles from January of particular interest to R users. Sponsorships from Revolution Analytics are now available for local R user groups in 2012. The winners of the Applications of R in Business Contest have been announced. The coefplot package visualizes model coefficients and standard errors in a line chart. Revolution Analytics...

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Statistics on the length and linguistic complexity of bills

February 13, 2012
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Statistics on the length and linguistic complexity of bills

  Where would you go to find out what the longest bill of the 112th Congress was by number of sections (H. R. 1473)?  How about by number of unique words (H.R. 3671)?  What about by Flesh-Kincaid reading level  (S. … Continue reading →

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A slice of S&P 500 kurtosis history

February 13, 2012
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A slice of S&P 500 kurtosis history

How fat tailed are returns, and how does it change over time? Previously The sister post of this one is “A slice of S&P 500 skewness history”. Orientation The word “kurtosis” is a bit weird.  The original idea was of peakedness — how peaked is the distribution at the center.  That’s what we can see, … Continue reading...

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Multiple Factor Model – Building CSFB Factors

February 12, 2012
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Multiple Factor Model – Building CSFB Factors

This is the third post in the series about Multiple Factor Models. I will build on the code presented in the prior post, Multiple Factor Model – Building Fundamental Factors, and I will show how to build majority of factors described in the CSFB Alpha Factor Framework. For details of the CSFB Alpha Factor Framework

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Data Exploration – Gold vs Gold Mining Stocks

February 12, 2012
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Data Exploration – Gold vs Gold Mining Stocks

I have been looking into time series analysis with R.  I'm still ramping up the learning curve as I am very accustomed to SAS/ETS.  With ETS, everything is in a couple of procedures, I know where and how to get things done.  In R, things...

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R and presentations: a basic example of knitr and beamer

February 12, 2012
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Manually combining R code and a presentation can be quite a pain. Luckily, using tools like odfWeave, Sweave and knitr, integrating documents and R code is quite painless. In this post I want to take a look at combining the… See more ›

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Write data (frame) to Excel file using R package xlsx

February 12, 2012
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Write data (frame) to Excel file using R package xlsx

Writing to Excel files comes up rather often, especially if you’re collaborating with non-OSS users. There are several options, but I like the xlsx package way of doing things. Authors use Java to write to Excel files, which are basically compressed XML files. Alright, let’s get cracking. First, let’s create some data. If you don’t

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The R-Podcast Episode 1: Introduction

February 12, 2012
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Here is the inaugural episode of the R-Podcast! In this episode, I take a few minutes to introduce myself and to explain the main goals of this podcast. I also define what R is and give an overview of R’s history of development and features that distinguish it from other statistical software. Please feel free

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