Monthly Archives: March 2012

Reminder: Kölner R User Group meets on 30 March 2012

March 26, 2012
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Reminder: Kölner R User Group meets on 30 March 2012

Venue: Sion em Keldenich, Weyertal 47, 50937 Cologne, Germany, 6 p.m., 30 March 2012, View Larger MapFor more details and registration see the Kölner R User Group page.

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R functions for serious stats

March 25, 2012
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R functions for serious stats

UPDATE: Some problems arose with my previous host so I have now updated the links here and elsewhere on the blog. The companion web site for Serious Stats has a zip file with R scripts for each chapter. This contains examples of R code and and all my functions from the book (and a few extras).

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The R-Podcast Episode 4: Data Structures-Introduction

March 25, 2012
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In this episode: Site updates, additional screencasts about R from other sites, listener feedback, and discussion on the fundamental data structures for R: vectors, matrices, lists, and data frames. The R code discussed in this episode is available in our GitHub repository, see the show notes for details. Leave us a voicemail a +1-269-849-9780, or

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Popularity of Programming Languages

March 25, 2012
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Popularity of Programming Languages

As you can see, R is relatively popular (but more so on StackOverflow than GitHub):For the original graph, click here. This scatter plot is a reminder that R is useful to learn not only for statistical modeling (since there are so many excellent packag...

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Canonical Correlation Analysis for finding patterns in coupled fields

March 25, 2012
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Canonical Correlation Analysis for finding patterns in coupled fields

First CCA pattern of Sea Level Pressure (SLP) and Sea Surface Temperature (SST) monthly anomalies for the region between -180 °W to -70 °W and +30 °N to -30 °S. The following post demonstrates the use of Canonical Correlation Analysis (CCA) for diagnosing coupled patterns in climate fields....

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Classification Trees and Spatial Autocorrelation

March 25, 2012
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Classification Trees and Spatial Autocorrelation

I'm currently trying to model species presence / absence data (N = 523) that were collected over a geographic area and are possibly spatially autocorrelated. Samples come from preferential sites (sea level > 1200 m, obligatory presence of permanent ...

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The R-Podcast Episode 4: Data Structures-Introduction

March 25, 2012
By

In this episode: Site updates, additional screencasts about R from other sites, listener feedback, and discussion on the fundamental data structures for R: vectors, matrices, lists, and data frames. The R code discussed in this episode is available in ...

Read more »

VIDEO: Applying "MSC" math-treatment to our raw spectra in "R".

March 25, 2012
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VIDEO: Applying "MSC" math-treatment to our raw spectra in "R".

(This article was first published on NIR-Quimiometría, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on their blog: NIR-Quimiometría. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL,...

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Levenshtein distance in C++ and code profiling in R

March 25, 2012
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Levenshtein distance in C++ and code profiling in R

At work, the client requested, if existing search engine could accept singular and plural forms equally, e. g. “partner” and “partners” would lead to the same result. The first option – stemming. In that case, search engine would use root of a word, e. g. “partn”. However, stemming has many weaknesses: two different words might have same root, a

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Disproportionality Data

March 25, 2012
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Disproportionality Data

So I was hunting around for some data on disproportional electoral outcomes (when the proportion of voters cast for political parties is not close to the proportion of legislative seats that they win).Michael Gallagher keeps an updated version of his L...

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