As the number of R users and contributed packages increases, activity on the R-help mailing list and the R tag on Stack Overflow also continues to rise. Users with the knowledge to help those asking questions naturally have limited time to ass... [Read more...]

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Because the next official release of Emacs will finally have a built-in package management system, I’ve been able to update the Emacs Starter Kit for the Social Sciences to make it easier to set up. AucTeX is now installed directly as a package, and so is ESS. While the ... [Read more...]

One of the features I feel that I don’t leverage enough, particularly for ad-hoc questions, is the clipboard feature  in R. I know there are many ways to use it –  as I have been exposed to a few –  but the example below, even without context, should get you thinking ... [Read more...]

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The R language is definitely going mainstream:... [Read more...]

Just wrapped up the slides for the first version of the The Joy of Sweave – A Beginner’s Guide to Reproducible Research with Sweave which I presented today in our lab. I am making the slides available under a Creative Commons … Continue reading → [Read more...]

Bank of Japan(BOJ) publish research paper regularly.And, they issued very interesting paper about valuation of CDO recently.(The paper is 金融危機時における資産価格変動の相互依存関係：コピュラに基づく評価 新谷　幸平、山田　哲也、吉羽　要直(sorry,japanese only!)) They introduced copula for pricing of CDO,and discussed how different CDO spreads were with using different copula for pricing.I would like to reproduce ... [Read more...]

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Summary: Very comprehensive and very useful, but not good for a beginner. Great book though – definitely has a place on my bookshelf. Reference: Adler, J., 2010, R in a Nutshell, O’Reilly, Sebastopol, CA, 611 pages  O’Reilly Link After reviewing a book about R designed for beginners (see my previous post) ... [Read more...]

In case you missed them, here are some articles from December of particular interest to R users. A Facebook employee created a beautiful visualization of social connections around the world, which made a lot of news on the Web. The creator, Paul Butler, explained how he did it using R. ... [Read more...]

My friend Jeff deserves a sincere congratulation for finally unveiling his rebranded R consultancy Lemnica. One notable feature of the new website is a section called esoteric R which discusses less frequently-visited corners of the R world. It even b... [Read more...]

As with the one-way case, testing the omnibus hypothesis via two-way ANOVA is simple process in R. This tutorial will explore how R can be used to perform a two-way ANOVA to test the difference between two (or more) group means. Tutorial FilesBefore we... [Read more...]

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Did you wake up this morning hoping that you would be able to listen to telephone beeps inspired by Estonian web site metrics? I knew you did! First things first: I came up with the slightly crazy idea of using the bleepy sounds that telephones make, called “dual-tone multifrequency” (DTMF) ... [Read more...]

While there are many online climate data resources, the source data files are in numerous data formats, presenting a challenge to climate citizen scientists who want to retrieve and analyze several climate indicators at the same time. I have been … Continue reading → [Read more...]

The good folks at Bespoke Investment Group frequently show charts of so-called overbought or oversold levels; see e.g. here for the most recent global markets snapshot. Classifying markets as overbought or oversold is a popular heuristic. It starts... [Read more...]