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Monthly Archives: May 2009

Ubuntu Developer Summit in Barcelona

Due to some things falling into place, I had an opportunity to attend the first two days of last week's Ubuntu Developer Summit in beautiful Barcelona. Somehow, I had never managed to attend a Debian conference either, so it was good to meet a few of the old Debian hands now moving Ubuntu along, as well as a few of the Ubuntu...

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Nice Interview

May 31, 2009
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Nice Interview

Here you can read a nice interview with David Smith, REvolution Computing’s Director of Community, statistician and bloggeR.

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R used by KDD 2009 cup winner of slow challenge

May 31, 2009
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R used by KDD 2009 cup winner of slow challenge

The results from the KDD Cup 2009 challenge (which we wrote about before) are in, and the winner of the slow challenge used the R statistical computing and analysis platform for their winning submission.

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Emacs: AucTeX + Rubber + Sweave

May 30, 2009
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I got rubber to work with auctex and sweave (Rnw) files with the help of this. Basically, combined with my other stuff, I tweaked my .emacs file to look like: ;;following is AucTeX with Sweave -- works ;;http://andreas.kiermeier.googlepages.com/essmaterials (setq TeX-file-extensions '("Snw" "Rnw" "nw" "tex" "sty" "cls" "ltx" "texi" "texinfo")) (add-to-list 'auto-mode-alist '("\\.Rnw\\'" . Rnw-mode)) (add-to-list

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JPM Chase Corporate Challenge 2009

The 28th annual JP Morgan Chase Corporate Challenge race took place a couple of days ago May 21. Participation was down from the record of 23,000 runners set last year at around 17,125. With splendid weather, it is always a nice way to start the Memorial day weekend. We fielded a small but spirited team of nine runners. I finished with a decent (hand-stopped)...

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The R Journal, Issue 1 Volume 1

May 29, 2009
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The R journal just published its inaugural peer-reviewed journal. Aligned with the open-source mantra, the journal is free and openly accessible. The journal features short articles on topics focused on R, including notes about new add-on packages, hints for R newcomers, application reports detailing examples of data analysis with R, and other news items. The current...

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R tips: Use read.table instead of strsplit to split a text column into multiple columns

May 29, 2009
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R tips: Use read.table instead of strsplit to split a text column into multiple columns

Someone on the R-help mailing list had a data frame with a column containing IP addresses in quad-dot format (e.g. 1.10.100.200). He wanted to sort by this column and I proposed a solution involving strsplit. But Peter Dalgaard comes up with a much nicer method using read.table on a textConnection object:

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R Journal 1/1

May 29, 2009
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R Journal 1/1

R Journal 1/1 is out! Download it from here.

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Accessing Soil Survey Data via Web-Services

May 28, 2009
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Accessing Soil Survey Data via Web-Services

Soil Survey Data ? Online Querying of NRCS Soil Survey Data Sometimes you are only interested in soils data for a single map unit, component, or horizon. In these cases downloading the entire survey from Soil Data Mart is not worth the effort. An online query mechanism would suffice. The NRCS provides a form-based, interactive querying mechanism and a SOAP-based analogue. These...

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Making Sense of Large Piles of Soils Information: Soil Taxonomy

May 27, 2009
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Making Sense of Large Piles of Soils Information: Soil Taxonomy

Western Fresno Soil Hierarchy: partial view of the hierarchy within the US Soil Taxonomic system ? Soil Data Field and lab characterization of soil profile data result in the accumulation of a massive, multivariate and three-dimensional data set. Classification is one approach to making sense of a large collection of this type of data. US Soil Taxonomy is the primary soil classification...

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