January 2009

IBrokers Featured on Quantitative Trading

January 17, 2009 | 0 Comments

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 | 0 Comments

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 | 0 Comments

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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littler 0.1.2

January 14, 2009 | 0 Comments

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 ... [Read more...]

Analyzing Nike+ using R

January 14, 2009 | 0 Comments

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... [Read more...]

Error Bars in R (& other R stuff)

January 14, 2009 | 0 Comments

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 → [Read more...]

R resources for psychologists

January 12, 2009 | 0 Comments

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 ... [Read more...]

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

January 12, 2009 | 0 Comments

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 ...
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TextWrangler and R

January 10, 2009 | 0 Comments

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... [Read more...]

Rcpp 0.6.3

January 9, 2009 | 0 Comments

I just pushed Rcpp 0.6.3 out to CRAN and Debian. This version adds a fix to the OS X installation (thanks to Simon Urbanek), adds some 'view-only' classes for R vectors, matrices and string vectors (kindly suggested/provided by David Reiss) as well two shorter helper functions to derive compilation and ... [Read more...]

Review of R in NYT and GDAT

January 8, 2009 | 0 Comments

GDAT instructor, Jim Holtman, pointed me at this review of R in yesterday's New York Times. It definitely puts SAS on the defensive.Update: Another piece in the tech section of NYT.If you want to know how to apply R to performance data, sign up for th...
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R in the New York Times (updated)

January 8, 2009 | 0 Comments

There’s an article in the New York Times about R: [ click here ] An excerpt from the article: To some people R is just the 18th letter of the alphabet. To others, it’s the rating on racy movies, a … Continue reading → [Read more...]

R-Sessions 30: Visualizing missing values

January 8, 2009 | 0 Comments

It always takes some time to get a grip on a new dataset, especially large ones. The code-books are often as indispensable as they are massive, and not always as clear as one would want. Routings, and resulting and strange patterns of missing values are at times difficult to find. ...
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Google Summer of Code 2009

January 7, 2009 | 0 Comments

Word is out that there will be a 2009 edition of the Google Summer of Code. I have some follow-up ideas based on last year's mentoring for both Debian and R, but there will be a better time and place to discuss possible project ideas. [Read more...]

R featured in New York Times article

January 7, 2009 | 0 Comments

Today's New York Times carries a decent article about R. Predictably, this lead to one (short), two (longest), three (short) threads on the main R mailing list. One aspect merits further highlighting. The reporter asked whether R would pose a threat to SAS: "I think it addresses a niche market ... [Read more...]

Forecasting Presidential Elections

January 7, 2009 | 0 Comments

Because of Andrew Gelman’s strong, repeated recommendations, I’ve been reading “Forecasting Presidential Elections” by Steven J. Rosenstone for the last two days. It’s quite a remarkable book and complex enough that I’m sure I’ll return t...
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New York Times on R

January 7, 2009 | 0 Comments

This article by New York Times surely shows that R is one of mainstream statistical packages.Update: See also a followup article.
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Combining R and LaTeX with Sweave

January 6, 2009 | 0 Comments

Today I did some experiments to learn how to combine R and LaTeX to create reproducible research reports. Here are my first results:First Demo Publish at Scribd or explore others: UNIX ... [Read more...]

Multiseat setup via Userful

January 3, 2009 | 0 Comments

As I had blogged a while back, multiseat use broke following the normal upgrade to Ubuntu 8.10. I had also suggested a fix but it turns out that the fix didn't work. So we had a clear regression -- multiseat use of a single Ubuntu workstation with two screens, two keyboards ... [Read more...]
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