In previous posts I demonstrated R plots created using World Bank Data through their API. The following is a much nicer example of what is possible. Many thanks to Vincent Arel-Bundock for sharing his work to make the World Bank D...

We can use the R Commander GUI to fit logistic regression models with one or more explanatory variables. There are also facilities to plot data and consider model diagnostics. The same series of menus as for linear models are used to fit a logistic regression model. Fast Tube by Casper The “Statistics” menu provides access to various

Revolution Analytics is proud to sponsor the New York R User Group. The last meeting was on the theme of debugging in R, and some videos of the talks are now available at the Video Rchive. Jay Emerson have a talk on Basic debugging in R and Harlan Harris dived deeper on advanced debugging techniques. Also presenting were Peter...

I ran a across a strange bug in R recently. Like all the best programming languages, R treats functions as first class objects. That is to say that functions can be passed as arguments and return values from functions, named as variables, and, while not part of the strict definition of first class...

Here is a scatter plot with the coordinate labels deliberately omitted. Figure 1. Do you see any trends? How would you model these data? It just so happens that this scatterplot is arguably the most famous scatterplot in history. One aficionado, writing more than forty years after its publication, commented skeptically :" data points were consequently spread...

Sample once from the Uniform(0,1) distribution. Call the resulting value . Multiply this result by some constant . Repeat the process, this time sampling from Uniform(0, ). What happens when the multiplier is 2? How big does the multiplier have to be to force divergence. Try it and see: iters = 200 locations = rep(0,iters)

Here's another great example of R being used to analyze sports data. Statistician and skier Joran Elias has started a project to analyze and visualize international cross country ski racing results, and he publishes his analysis at the blog Statistical Skier. All of the analyses are done using R (and for data, SQLite via the RSQLite package). As much...

The top six most violent municipalities are near the US border. Ciudad Juárez is in a class by itself with 113 homicides per 100,000 people. José Azueta is the municipality where Zihuatanejo is located. Mazátlan, another popular tourist destination, also appears on the list. Lázaro Cárdenas is the largest seaport in Mexico and ever since the...

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