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A Request for Foursquare Data

[UPDATE 3/28/2011: Fixed an enormous bug in the R code.] I’m trying to collect data sets that showcase how the classical statistical distributions appear in modern contexts. I’ve already got some data that shows how the gamma distribution appears in video game scores, and now I’m hoping to find an example where the exponential distribution […]

Spam Comments

I may have deleted a genuine comment by accident today while cleaning out the spam queue. My apologies if it was yours. I generally delete all the comments in my spam queue without checking their contents carefully because of their quantity. Only after clicking the delete button a few moments ago did I notice that […]

A 3D Version of R's curve() Function

A 3D Version of R’s curve() Function

I like exploring the behavior of functions of a single variable using the curve() function in R. One thing that seems to be missing from R’s base functions is a tool for exploring functions of two variables. I asked for examples of such a function on Twitter today and didn’t get any answers, so I […]

Canabalt Revisited: Gamma Distributions, Multinomial Distributions and More JAGS Goodness

Canabalt Revisited: Gamma Distributions, Multinomial Distributions and More JAGS Goodness

Introduction Neil Kodner recently got me interested again in analyzing Canabalt scores statistically by writing a great post in which he compared the average scores across iOS devices. Thankfully, Neil’s made his code and data freely available, so I’ve been revising my original analyses using his new data whenever I can find a free minute. […]

Review of R Graphs Cookbook

The kind people at Packt Publishing recently asked me to review one of their newest R books: the R Graphs Cookbook. In general, I think pretty highly of the book: it provides a nice overview of the basic tools for visualizing data in R. If you’re just getting started with creating graphs in R, this […]