Monthly Archives: January 2009

IBrokers Featured on Quantitative Trading

January 17, 2009
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IBrokers Featured on Quantitative Trading

Jeff Ryan's IBrokers package was mentioned on Ernie Chan's blog, Quantitative Trading. Though the package is still in pre-alpha stage, it is generating quite a bit of interest.Source:Ernie ChanFriday, January 16, 2009Quantitative Trading: Algorithmic ...

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Versions of Sweave.sh

January 16, 2009
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Versions of Sweave.sh

There are now many places where one can find "my" Sweave.sh shell script for running Sweave and post processing with LaTeX directly from the command line. I published first version of Sweave.sh here (web page of the department). Later I moved my pages ...

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Use of include and input in Sweave documents

January 16, 2009
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Use of include and input in Sweave documents

When you write a large structured document using LaTeX, it is wise to use \input{} and/or \include{} commands (see here for a nice description). However, you can not "fully" use these two commands with Sweave documents. You can use them, but when you w...

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Creating R Packages: A Tutorial

January 16, 2009
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Creating R Packages: A Tutorial

See here.

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littler 0.1.2

January 14, 2009
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Version 0.1.2 of r (pronounced littler) was just rolled up. This version adds two new command-line switches: -t selects per-session temporary directories in the same way as R does (with thanks to Paul Gilbert for the suggestion), and -q skips autoloading of default libraries at startup for another small yet noticeable gain in startup speed (with thanks to Simon Urbanek). As usual, our code in...

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Analyzing Nike+ using R

Analyzing Nike+ using R

A couple of weeks ago, I finally took up running seriously. To keep myself motivated -- especially on dark winter nights -- I bought the Nike+ iPod sports kit. The sports kit was developed by a partnership of Nike and Apple, and consists of a tiny acce...

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Error Bars in R (& other R stuff)

January 14, 2009
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Error Bars in R (& other R stuff)

I came across a useful post showing how to generate error bars on plots in R Note that for bar plots with error bars, you can use the function barplot2 which is associated with the gplots package (click [ here … Continue reading →

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R resources for psychologists

January 12, 2009
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R resources for psychologists

As a quick follow-up to my previous post, I'll quickly note some R links specifically aimed at psychologists. Jonathan Baron and Yuelin Li have a excellent set of notes that cover ground from R basics to ANOVA (including repeated measures ANOVA) and beyond. Jonathan Baron also maintains a general set of R links. William Revelle's R guide for...

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R gets some -E-S-P-E-C-T

January 12, 2009
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R gets some -E-S-P-E-C-T

NEW YORK TIMES STORY ON THE APPEAL OF R (click to view movie) It is no secret that Decision Science News is crazy about the R language for statistical computing. Find out why R is so great in this New York Times article. Then start to teach yourself R with our short series of video

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TextWrangler and R

TextWrangler and R

R is an environment for statistical computing (see also ‘Data Analysts Captivated by R's Power’ in the New York Times) which I use on an almost daily basis. However, the included text editor is not all that great, and that is why I use Text...

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