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Visualizing the Haiti earthquake with R

January 13, 2011 | David Smith

Yesterday was the one-year anniversary of the Haiti earthquake, and to put the scale of the event in context San Francisco bureau chief for New Scientist magazine and data journalist Peter Aldhous created a time-lapse animation of all large earthquakes in the last year, beginning with the 7.0-magnitude Haiti event. ... [Read more...]

Survival paper (update)

January 13, 2011 | csgillespie

In a recent post, I discussed some  statistical consultancy I was involved with. I was quite proud of the nice ggplot2 graphics I had created. The graphs nicely summarised the main points of the paper: I’ve just had the proofs from the journal, and next to the graphs there ...
[Read more...]

R: Attack of the hair-trigger bees?

January 12, 2011 | Matt Asher

In their book “Complex Adaptive Systems”, authors Miller and Page create a theoretic model for bee attacks, based on the real, flying, honey-making, photogenic stingers. Suppose the hive is threatened by some external creature. Some initial group of guard bees sense the danger and fly off to attack. As they ... [Read more...]

CosmoPMC released

January 12, 2011 | xi'an

Martin Kilbinger, an astronomer (cosmologist) with whom we had worked on population Monte Carlo for cosmological inference [during the ANR-05-BLAN-0283- 04 ANR ECOSSTAT grant], has made the PMC C codes available on the CosmoPMC webpage. He has also written a CosmoPMC manual that is now available from arXiv. And ...
[Read more...]

Winners of Mozilla Open Data Competition announced

January 12, 2011 | David Smith

The winners of the Mozilla Open Data Visualization competition "How Do People Use Firefox" have been announced. The competition attracted 32 entries, each visualizing an aspect of data collected in the Mozilla Test Pilot program to reveal insights about how people use the popular open-source browser Firefox. I was honoured to ... [Read more...]

Random variable generation (Pt 3 of 3)

January 12, 2011 | csgillespie

Ratio-of-uniforms This post is based on chapter 1.4.3 of Advanced Markov Chain Monte Carlo.  Previous posts on this book can be found via the  AMCMC tag. The ratio-of-uniforms was initially developed by Kinderman and Monahan (1977) and can be used for generating random numbers from many standard distributions. Essentially we transform the ... [Read more...]

RProtoBuf 0.2.2

January 12, 2011 | Thinking inside the box

Thanks to two patches by Murray Stokely, we have a nice new minor release 0.2.2 of RProtoBuf out on CRAN. RProtoBuf provides GNU R bindings for the Google Protobuf data encoding library used and released by Google. The NEWS file entry follows bel... [Read more...]

Two short Bayesian courses in South’pton

January 12, 2011 | xi'an

An announcement for two short-courses on Introduction to  Bayesian Analysis and MCMC, and Hierarchical Modelling of Spatial and Temporal Data by Alan Gelfand (Duke University, USA) and Sujit Sahu (University of Southampton, UK), are to take place in Southampton on June 7-10, this year. Course 1: Introduction to Bayesian Analysis and ... [Read more...]

The number 1 novice quant mistake

January 12, 2011 | Pat

It is ever so easy to make blunders when doing quantitative finance.  Very popular with novices is to analyze prices rather than returns. Regression on the prices When you want returns, you should understand log returns versus simple returns. Here we will be randomly generating our “returns” (with R) and ...
[Read more...]

Create Motion Charts in R with the GoogleVis package

January 11, 2011 | David Smith

Hans Rosling popularized Motion Charts -- 2-d scatterplots that animate over time -- with the GapMinder project. Motion Charts were taken to their augmented-reality extreme in this clip from the BBC programme, The Joy of Stats, but now you can create similar (if less audacious) motion charts for yourself with ... [Read more...]

Introducing the Lowry Plot

January 11, 2011 | richierocks

Here at the Health and Safety Laboratory* we’re big fans of physiologically-based pharmacokinetic (PBPK) models (say that 10 times fast) for predicting concentrations of chemicals around your body based upon an exposure. These models take the form of a big system of ODEs. Because they contain many equations and consequently ...
[Read more...]

Data-Driven Journalism

January 11, 2011 | VCASMO - drewconway

The December 2010 meeting of the Bay Area R Users Group featured Peter Aldhous, San Francisco bureau chief of New Scientist magazine who will give a presentation on "Data-Driven Journalism". From the WikiLeaks War Diaries, to geographical analyses of ... [Read more...]

Maps with R, part… n+1

January 11, 2011 | arthur charpentier

Following the idea posted on James Cheshire's blog (here), I have tried to play a little bit with R and Google. And it works ! Consider for instance life expectancy at birth (that can be found - and downloaded - here). Using the following code, it ...
[Read more...]

Cursed numbers ?

January 11, 2011 | arthur charpentier

In Lost, Hugo “Hurley” Reyes played the numbers 4, 8, 15, 16, 23 and 42 at the lottery, and ended up winning the $114-million jackpot. And over the ensuing weeks, everyone around him seems to suffer increasingly bad luck: Hurley’s grandfathe...
[Read more...]

OpenData + R + Google = Easy Maps

January 11, 2011 | James

The release of the R package “googleVis” has made the production of interactive maps through Google’s Chart Tools a simple task. Ignoring the some basic data manipulation the below map... [Read more...]
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