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The night of the presidential elections I wrote a post celebrating the victory of data over punditry. I was motivated by the personal attacks made against Nate Silver by pundits that do not understand Statistics. The post generated a little … Continue reading → [Read more...]

I guess that all those that tried to follow the presidential election as closely as possible are more than just a little bit exhausted mentally. I call this PEBOS - Post Election Burn Out Syndrome.Among us some concentrated on the horserace aspect of t... [Read more...]

We're pleased to announce that the latest update to Revolution R Enterprise is available today! Existing subscribers will soon receive an email with update instructions, and the free academic distribution will be updated later today. Version 6.1 adds a frequently-requested big-data statistical modeling algorithm, adds new connectivity option for Hadoop, improves ... [Read more...]

UPDATED 2013-04-08 This functionality it now available in the soilDB and sharpshootR packages. All code on this page is now superseded by the fetchOSD() and SoilTaxonomyDendrogram()functions. UPDATED 2012-11-07 I have been thinking about a URL-ba... [Read more...]

After my last post on Bayesian bootstrap I got a question why the sample from Dirichlet distribution is taken as weights for calculating mean in the procedure and not as weights used for sampling from the original data set. Actually this mistake i... [Read more...]

Phylogenetic trees are a specialization of hierarchical clustering which elegantly capture relatedness between observations, grouping like with like. Yet hierarchical clusterings have one common complaint, as compared to density/distribution based clustering, the ability to classify the data into different types. … Continue reading → [Read more...]

The last few days have been trying, mostly because folks keep asking me the same questions: have you voted? Who do you think will win the election? Do you think Nate Silver (http://fivethirtyeight.blogs.nytimes.com/)  is right? How confident are you ... [Read more...]

This is a silly problem that bit me again recently. It’s an elementary mistake that I’ve somehow repeatedly failed to learn to avoid in eight years of R coding. Here’s an example to demonstrate. Suppose we create a data frame with a categorical column, in this case ... [Read more...]

The headlines have been buzzing with the “triumph” of statistics and math in this election.  But before I jump into how well statistics served us, let’s do a little primer on the margin of error. Whenever we measure less than the whole population we’ll have some variability in ... [Read more...]

Well, one election is over but it is never too soon to start another – or in this case revisit the past four years One day after the 2008 US Presidential election, there was a Rasmussen poll taken of 1000 likely voters asking for their choice for the 2012 Republican Presedential Candidate. The overwhelming ... [Read more...]

Today just gets better and better!I had an email this morning from Christoph Pfeiffer, who follows this blog. Christoph has put together some nice R code that implements the Toda-Yamamoto method for testing for Granger causality in the context of non-stationary time-series data.Given the ongoing interest in the ... [Read more...]

Next week on Friday, November 16, the RBelgium R user group is holding its next Regular meeting in Brussels. This is the schedule of the upcoming RBelgium Regular meeting:* Graphical User Interface developments around R, including tcltk2 and SciViews - Philippe Grosjean (UMons)* Using R via the Amazon Cloud - Jean-Baptiste ... [Read more...]

In case you missed them, here are some articles from October of particular interest to R users. Sponsorships for local R user groups from Revolution Analytics are now open to applicants worldwide. During the landfall of Hurricane Sandy in the US, several R-based apps used public weather and social media ... [Read more...]

I’ve been using R on a daily basis for more than seven years, and I’ve been developing R packages over the last three years. I consider myself an experienced useR and most of my coworkers consider me an R master. However, there are still a lot of things ... [Read more...]

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some hacker news criticism convinced me to take a stab at the question: "what is R?" answer: the lingua statistica, s'il vous plaît. met my hero and the inspiration behind this website. bonus video: how to make coffee with r in two minutes. [Read more...]

You’ve already seen everyone else’s electoral map (see this amazing array of maps from 2008), how would you like to make your own? Today’s Gist allows you to do just that — input (manually!) state-by-state results, and output a... [Read more...]

Just had my supper. Stomach is full of stewed beef and potato.  I’d like to solve the 22nd Euler problem before tonight work (right, I’ll work late in my office). Using names.txt (right click and ‘Save Link/Target As…’), a 46K text file containing over … Continue reading → [Read more...]