May 2010

Vanilla Rao-Blackwellisation [re]revised

May 31, 2010 | xi'an

Although the revision is quite minor, it took us two months to complete from the time I received the news in the Atlanta airport lounge… The vanilla Rao-Blackwellisation paper with Randal Douc has thus been resubmitted to the Annals of Statistics. And rearXived. The only significant change is the inclusion ... [Read more...]

R 2.11.1 released

May 31, 2010 | David Smith

It's official: R 2.11.1 is out. Source code and binaries for Windows and MacOS are available at the master CRAN mirror, and will be available for download from your local mirror soon. As anticipated, this is an update release focussing mainly on bugfixes and with just one new feature. According to ... [Read more...]

A logo for R?

May 31, 2010 | Matt Asher

In light of my recent attempt at aRt, Tal from R bloggers suggested I submit a T-shirt design for this contest. That got me thinking that R needs a logo freshining in general, so I dusted off my technical pens and drafted something. I’ll explain why I think this ... [Read more...]

highlight 0.2-0

May 31, 2010 | romain francois

I've released version 0.2-0 of highlight to CRAN This version brings some more additions to the sweave driver that uses highlight to produce nice looking vignettes with color coded R chunks The driver gains new arguments boxes, bg and border to c... [Read more...]

Betting on Pi

May 31, 2010 | Matt Asher

I was reading over at math-blog.com about a concept called numeri ritardatari. This sounds a lot like “retarded numbers” in Italian, but apparently “retarded” here is used in the sense of “late” or “behind” and not in the short bus sense. I barely scanned the page, but I think ... [Read more...]

A data visualization manifesto

May 31, 2010 | Andrew Gelman

Details matter (at least, they do for me), but we don't yet have a systematic way of going back and forth between the structure of a graph, its details, and the underlying questions that motivate our visualizations. (Cleveland, Wilkinson, and.... [Read more...]

Simulating a Queue in R

May 30, 2010 | Neil Gunther

In the GCaP class earlier this month, we talked about the meaning of the load average (in Unix and Linux) and simulating a grocery store checkout lane, but I didn't actually do it. So, I decided to take a shot at constructing a discrete-event simulatio...
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Talk at CRiSM

May 30, 2010 | xi'an

This is the talk I am giving at the workshop on model uncertainty organised by the Centre for Research in Statistical Methodology (CRiSM) at the University of Warwick, on May 30-June 1. Careful readers will notice there is not much difference with my previous talk on the topic, as I only ... [Read more...]

Dynamic Modeling 2: Our First Substantive Model

May 30, 2010 | Tony

(This is the second of a series of ongoing posts on using Graph Algebra in the Social Sciences.) First-order linear difference equations are powerful, yet simple modeling tools.  They can provide access to useful substantive insights to real-world phenomena.  They can have powerful predictive ability when used appropriately.  Additionally, they ... [Read more...]

Source Code Files in R

May 29, 2010 | C

R's interactive programming style is similar to what I have seen in other environments (e.g. ruby's irb and Oracle's SQL*Plus, etc). There are a few commands that you need to be aware of to get up and running with developing R programs.To identify yo...
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Weekend art in R (part 1?)

May 29, 2010 | Matt Asher

As usual click on the image for a full-size version. Code: par(bg="black") par(mar=c(0,0,0,0)) plot(c(0,1),c(0,1),col="white",pch=".",xlim=c(0,1),ylim=c(0,1)) iters = 500 for(i in 1:iters) { center = runif(2) size = rbeta(2,1,50)   # Let's create random HTML-style colors color = sample(c(0:9,"A","B","C","D","E","F"),12,... [Read more...]

highlight 0.1-9

May 29, 2010 | romain francois

The version 0.1-8 of highlight introduced a small bug in the latex renderer. This is now fixed in version 0.1-9 and the latex renderer also gains an argument "minipage" which wraps the latex code in a minipage environment. I've used this to make... [Read more...]

Syncing files across computers using DropBox

May 29, 2010 | Tal Galili

Motivation In the past few months I have been using DropBox for syncing my work files between my home and work computer. It has saved me from numerous mistakes and from sending the files to myself via e-mail. Recently I found this service highly useful for sharing files with 4 other ...
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