I've had a lot of requests, so here they are.  Hopefully, all of the slides will be posted on the conference website. [Read more...]

  A languages manual usually defines how a language behaves, but does not warn you in cases where you assume a feature should be supported but isn’t. As an example, I will talk about the subtle variable scoping in R language. {} code blocks A lot of programmers coming from C/... [Read more...]

I was recently completing some professional development activities that required me to write a report on a self-chosen topic related to diversity in student backgrounds. I chose to use the opportunity to reflect on the potential for using R to teach psychology students research methods. I thought I'd share the ... [Read more...]

by Joseph Rickert It is very likely that even a very casual observer what is happening in the world of R these past few months would have come across some mention of Rcpp, the R package that greatly facilitates R and C++ integration. Rcpp is hot! Over 130 R packages now ... [Read more...]

Motivated by a tweet from Tony Hirst (http://blog.ouseful.info/), I started experimenting with an rCharts implementation of the d3 sankey plugin.  While I was putting together examples, I found lots of gaps in my knowledge of sankeys and network a... [Read more...]

Robert Mathews said that : "Ronald Fisher gave scientists a mathematical machine for turning baloney into breakthroughs, and ukes into funding. It is time to pull the plug.". He's right. In one previous life, I wrote a thesis in Philosophy. But, a specific area, Epistemology also calledtheory of knowledge, because, It ... [Read more...]

Up until very recently the only way of running R code was through the standard R distribution. Of course you could use another IDE, but somewhere underneath it all you would be running the same, standard R engine from the R-core team. This is no longer your only option. A ... [Read more...]

I am busy with a project where I need to calibrate the Heston Model to some Asian options data. The model has been implemented as a function which executes a Monte Carlo (MC) simulation. As a result, the objective function is rather noisy. There are a number of algorithms for ... [Read more...]

I'm a bit late catching up on this, but Mario Inchosa (Revolution Analytics US Chief Scientist) gave a standing-room-only talk on high-performance predictive analytics in R and Hadoop at last month's Hadoop Summit. In the talk, he described some of the progress we've made integrating the ScaleR parallel external-memory algorithms ... [Read more...]

There have been repeated calls for “space” in many fields of social science (all links are behind paywalls, sorry): Demography: (Voss 2007) Sociology: (Gieryn 2000) Epidemiology: for an early critical review (Jacquez 2000) Geography: obviously geographers were into space before it was cool. A couple of pieces I like are Doreen Massey’s ... [Read more...]

Nick Firoozye writes: While I am absolutely sympathetic to the Bayesian agenda I am often troubled by the requirement of having priors. We must have priors on the parameter of an infinite number of model we have never seen before and I find this troubling. There is a similarly troubling ... [Read more...]

The recent post How common are common words? made use of unusually explicit language for the Stubborn Mule. As expected, a number of email subscribers reported that the post fell foul of their email filters. Here I will return to the topic of n-grams, while keeping the language cleaner, and ... [Read more...]

[This article was first published on Open Analytics - Blog, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share [Read more...]

Yesterday the first R in Insurance conference took place at Cass Business School in London. I think the event went really well, but as a member of the organising committee my view is probably skewed. Still, we had a variety of talks, a full house, a gr... [Read more...]

The most recent edition of the Revolution Newsletter came out a couple of weeks ago. In case you missed it, the news section is below, and you can read the full July edition (with highlights from this blog and community events) online. You can subscribe to the Revolution Newsletter to ... [Read more...]

A new release of RProtoBuf -- now at version 0.3.0 -- arrived earlier on CRAN. RProtoBuf provides GNU R bindings for the Google Protobuf data encoding library used and released by Google. Murray added a lot of new features which merited the incre... [Read more...]

[This article was first published on Christopher Gandrud (간드루드 크리스토파), and kindly contributed to R-bloggers]. (You can report issue about the content on [Read more...]

Scientific writing – by which I mean journal articles – is a strange business, full of arcane rules and conventions with origins that no-one remembers but to which everyone adheres. I’ve always been amused by one particular convention: the sentence adverb. Used with a comma to make a point at the ... [Read more...]

As part of a one-day workshop, I have developped an online tutorial on how to create publication quality graphics using R (from an academic point of view). The tutorial can […] [Read more...]

This Wednesday at 11AM Eastern Time, Revolution Analytics UK Business Services Director Andrie DeVries will present a new webinar, Using Survival Analysis for Marketing Attribution. This webinar will focus on a new application of survival analysis (more traditionally used for life sciences application) to the domain of marketing: A central ... [Read more...]