"It may be that most consumers forget the attribute-based reasons why they chose or rejected the many brands they have considered and instead retain just a summary attitude sufficient to guide choice the next time."This is how Dolnicar and Rossiter con... [Read more...]

The 7th China R Conference in Beijing was held on May 24th ~May 25th in Renmin University of China. SupStat is really happy and honored to sponsor and attend this meeting. This is the largest ever R conference in China with 1814 registrations online and even 50 more requests of attendance with ... [Read more...]

In my last post, I was telling about the Brazilian influential incentives for parties to coalesce based on the share of TV advertising a party holds. I just played around with those data I have gathered to produce the following chart. It's not colors-representative of the parties, which would take ... [Read more...]

Recently I was tasked with evaluating and most importantly removing analytical variance form a longitudinal metabolomic analysis carried out over a few years and including __2,5000 measurements for __5,000 patients. Even using state-of-the-art analytical instruments and techniques long term biological studies are plagued with unwanted trends which are unrelated to the original ... [Read more...]

Antti Petajisto got a lot of attention with his research on Active Share and Tracking Error in mutual fund management.  While the research is fairly compelling, there is a missing discussion about a potential relationship between the two measures. The... [Read more...]

Check out this tweet: Just found out that @rdpeng @jtleek @bcaffo have enrolled 1,000,000 students in statistics classes on @coursera in last 2 years. — Simply Statistics (@simplystats) May 30, 2014 Those courses include Roger Peng's Computing for Data Analysis and Jeff Leek's "Data Analysis", and they all use the R language. That means more ... [Read more...]

Wouldn't it be great if there was a way to harness the familiarity and usability of a tool like R, and at the same time take advantage of the performance and scalability benefits of in-database/in-Hadoop computation? We're happy to announce PivotalR, a package that translates R code into SQL ... [Read more...]

I hope you have already heard about DataVis contest at useR!2014 (in case you did not, here is more information: http://www.oecd.org/pisa/pisaproducts/datavisualizationcontest.htm). As a jury member I am not going to submit any work, but I am going to encourage you to play with ... [Read more...]

A new package of mine appeared on CRAN today: RPushbullet. A few days ago, I had tweeted about a first version available via its GitHub repo. The package is now on CRAN which will make it easier to install for many. You still need an API key (free,... [Read more...]

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

Spreadsheets remain an important way for people to share and work with data. Among other providers, Google has provided the ability to create online spreadsheets and other documents. Back in 2009, David Smith posted a blog entry on how to use R, and specifically the XML package to import data from ... [Read more...]

An update to ggtern, version 1.0.3.2, is now available on CRAN! This version includes a number of bug fixes: Added convenience functions, and global options for modifying the length of the ternary arrows easily. Fixed broken ggsave function, which was not using the local print function. Fixed geom_errorbarR reference in ... [Read more...]

A feature all programming communities have in common is the numerous debates about why their programming language of choice is better, more advanced, faster, holier etc. In today’s data science community, it seems like these discussions are omnipresent with advocates of SAS, SPSS, R, Python, Julia, etc. battling and ... [Read more...]

In the previous post, I showed how easy it is to use R to scrape XML tables from websites (I used the XML package to scrape some basic basketball data).  In this post, I’ll explore the idea that NBA career … Continue reading → [Read more...]

Here’s yet another example where I just need to read the help files. Before I go on, I should add my own notion as to why that’s not always easy to do. On loads of message boards, you’ll see people say- correctly- that the documentation is very ... [Read more...]

In prior posts, I demonstrated how to download, calculate, and compare fantasy football projections from ESPN, CBS, NFL.com, and FantasyPros, which aggregates projections from many different sources to increase prediction accuracy.  Last year, I compared fantasy projections[...] The post Which Site Has the Best Fantasy Football Projections? 2014 Update appeared ... [Read more...]

Geomorph users,We have uploaded version 2.1 to CRAN. The windows and mac binaries have been compiled and the tarball is available.Version 2.1 comes with some small changes and new features: Mike Collyer has now officially joined the geomorph ... [Read more...]

Approximate Bayesian Computation (ABC) is an umbrella term for a class of algorithms and ideas that allow performing an approximate estimation of the likelihood / posterior for stochastic simulation models when the likelihood cannot be explicitly calculated (intractable likelihood). To give you the idea in a nutshell: to approximate the likelihood, ... [Read more...]

The useR! 2014 conference promises to be the biggest yet, with more than 500 registrations already. But there's room for plenty more R users! Check out the update from the organizing committer below, and if you haven't already done so, register for the conference at the useR! 2014 website. We are exactly one ... [Read more...]

There are a lot of good books on statistics, machine learning, analytics, and R. So it is valid to ask: how does Practical Data Science with R stand out? Why should a data scientist or an aspiring data scientist buy it? We admit, it isn’t the only book we ... [Read more...]