Here is a simple application to transform text into a beautiful word cloud, Text Mining to WordCloud. The purpose is to find out the highest frequency word in a certain text. It is an app built with R language, the source code is attached at the end of...
A Poisson process provides a good model for events that happen rarely. That's what von Bortkiewicz realized in 1898 when he modeled deaths by horse kick in Prussian cavalry; since it would be ungentlemanly to actually kill my readers, I instead represent the events in a Poisson process using a horse's whinny.
Autocorrelation of a time series can be useful for prediction because the most recent observation of the prediction target contains information about future values. At the same time autocorrelation can play tricks on you because many standard statistical methods implicitely assume independence of measurements at different times. The correlation coefficient between two variable and has 
My own version of bubble plot (part 1)During one of my projects, I found myself in need of visualizing more than 3 dimensions at once. Three-dimensional graphs are not a good solution, usually - they will need to be properly oriented, for a start, ad t...
Some of learn easily from the written word, but for most of us some visualization speeds up the process and generally helps with retention as well. With that in mind I was delighted to see this nice list of free videos that demonstrate the use of R, po...
In the last decade we have observed an increase in computational power, information availability, speed of execution and stock market competition in general. One might think that, as a result, we are prone to larger shocks that occur faster than … Continue reading →
Being freshly elected ASA Fellow (yay!), I just received the list of 2012 ASA Fellows. Among whose, let me mention Sudipto Banerjee, University of Minnesota, Minneapolis, Minnesota, elected “For theoretical, methodological and applied research in spatiotemporal statistical modeling, especially as applied to problems in environmetrics, ecology, occupational health, agriculture and economics, for professional work at 
Kevin Quealy, graphics editor at the New York Times, has published another fascinating behind-the-scenes look at how the Times creates data visualizations for print and online. In his latest post, he looks at how a visualization of the Yankee's Mariano Rivera performance compared to other Major League Baseball pitchers was created. (Detail below, click for the full image.) The...
Turns out that Megan would have never gotten a callback for an audition. (Via Ben Schmidt.)
I can’t believe I didn’t learn how to do it earlier, but I never knew how to accurately copy tables from excel that had text with spaces in them, and paste into a data frame in R without generating confusion … Continue reading →
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
