Blog Archives

R is going to have a GUI to ggplot2! (by the end of this years google-summer-of-code)

April 26, 2010
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I was delighted to see the following e-mail post from Dirk Eddelbuettel regarding the google-summer-of-code R google group: * * * Earlier today Google finalised student / mentor pairings and allocations for the Google Summer of Code 2010 (GSoC 2010). The R Project is happy to announce that the following students have been accepted: Colin Rundel, “rgeos – an...

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How to upgrade R on windows – another strategy (and the R code to do it)

April 23, 2010
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How to upgrade R on windows – another strategy (and the R code to do it)

Update: In the end of the post I added simple step by step instruction on how to move to the new system. I STRONGLY suggest using the code only after you read the entire post. Background If you didn’t hear it by now – R 2.11.0 is out with a bunch of new features. After Andrew Gelman recently lamented the lack...

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The difference between “letters[c(1,NA)]” and “letters[c(NA,NA)]“

April 22, 2010
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In David Smith’s latest blog post (which, in a sense, is a continued response to the latest public attack on R), there was a comment by Barry that caught my eye. Barry wrote: Even I get caught out on R quirks after 20 years of using it. Compare letters and letters for the most recent thing that made me...

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Parallel Multicore Processing with R (on Windows)

April 21, 2010
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Parallel Processing backend for R under windows - installation tips and some examples.

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An article attacking R gets responses from the R blogosphere – some reflections

April 16, 2010
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An article attacking R gets responses from the R blogosphere – some reflections

In this post I reflect on the current state of the R blogosphere, and share my hopes for the future

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“The next big thing”, R, and Statistics in the cloud

April 14, 2010
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A friend just e-mailed me about a blog post by Dr. AnnMaria De Mars titled “The Next Big Thing”. In it Dr. De Mars wrote (I allowed myself to emphasize some parts of the text): Contrary to what some people seem to think, R is definitely not the next big thing, either. I am always surprised when people ask me why I think...

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Repeated measures ANOVA with R (tutorials)

April 13, 2010
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Repeated measures ANOVA is a common task for the data analyst. There are (at least) two ways of performing “repeated measures ANOVA” using R but none is really trivial, and each way has it’s own complication/pitfalls (explanation/solution to which I was usually able to find through searching in the R-help mailing list). So for future reference, I am starting this page...

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Jeroen Ooms’s ggplot2 web interface – a new version released (V0.2)

April 12, 2010
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Good news. Jeroen Ooms released a new version of his (amazing) online ggplot2 web interface: yeroon.net/ggplot2 is a web interface for Hadley Wickham’s R package ggplot2. It is used as a tool for rapid prototyping, exploratory graphical analysis and education of statistics and R. The interface is written completely in javascript, therefore there is no need to install anything on the...

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Correlation scatter-plot matrix for ordered-categorical data

April 7, 2010
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Correlation scatter-plot matrix for ordered-categorical data

When analyzing a questionnaire, one often wants to view the correlation between two or more Likert questionnaire item’s (for example: two ordered categorical vectors ranging from 1 to 5). When dealing with several such Likert variable’s, a clear presentation of all the pairwise relation’s between our variable can be achieved by inspecting the (Spearman) correlation matrix (easily achieved in R...

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R-Node: a web front-end to R with Protovis

April 3, 2010
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R-Node: a web front-end to R with Protovis

Update (April 6 – 2010) : R-Node now has it’s own a website, with a dedicated google group (you can join it here) * * * * The integration of R into online web services is (for me) one of the more exciting prospects in R’s future. That is way I was very excited coming across Jamie...

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