February 2012

Gauging Interest in a Montreal R User Group

February 7, 2012 | Corey Chivers

Some of us over at McGill’s Biology Graduate Student Association have been developing and delivering R/Statistics workshops over the last few years. Through invited graduate students and faculty, we have tackled  everything from multi-part introductory workshops to get your feet wet, to special topics such as GLMs, GAMs, ... [Read more...]

What are the most popular bike routes in London?

February 7, 2012 | David Smith

James Cheshire, R user and lecturer at the UCL Centre for Advanced Spatial Analysis, created this map of the most trafficked cycle routes in London: Click to enlarge, it's a gorgeous chart. The bicycle traffic data comes from London's public cycle-hire facility, which currently is only available in central London (... [Read more...]

Early-February flotsam

February 7, 2012 | Luis

Mike Croucher at Walking Randomly points out an interesting difference in operator precedence for several mathematical packages to evaluate a simple operation 2^3^4. It is pretty much a divide between Matlab and Excel (does the later qualify as mathematical software?) … Continue reading →
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More Beautiful Growth of $1 Chart

February 6, 2012 | klr

With all my recent focus on reporting and visualization, you might think that I have the investments all figured out.  Unfortunately, that is not the case, and I will resume more standard investment and systems posts soon.  I did want to shar...
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General Bayesian estimation using MHadaptive

February 6, 2012 | Corey Chivers

If you can write the likelihood function for your model, MHadaptive will take care of the rest (ie. all that MCMC business). I wrote this R package to simplify the estimation of posterior distributions of arbitrary models. Here’s how it works: 1) Define your model (ie the likelihood * prior). In ... [Read more...]

Using apply() to create a unique id

February 6, 2012 | Tony Cookson

Suppose you have a data set with two identifiers. For example, maybe you're studying the relationships among firms in an industry and you have a way to link the firms to one another. Each firm has an id, but the unique unit in your data set is a pair...
[Read more...]

googleVis 0.2.14 is released

February 5, 2012 | Markus Gesmann

Version 0.2.14 of the googleVis package was released on CRAN today.ChangesThe help files have been checked against changes of the Google Visualisation API, typos in the vignette have been ironed out (thanks to Pat Burns for pointing them out), a new se...
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Comparing correlations update

February 5, 2012 | Thom Baguley

I have just published R code for calculating CIs for differences between correlations on the Serious stats book blog. This covers independent correlations (taken from chapter 6 of the book) and dependent correlations (new R code written as a suppl... [Read more...]

Rstudio and asreml working together in a mac

February 5, 2012 | Luis

December and January were crazy months, with a lot of travel and suddenly I found myself in February working in four parallel projects involving quantitative genetics data analyses. (I’ll write about some of them very soon) Anyhow, as I have … Continue reading → [Read more...]
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