Hadley Wickham recently shared a nice tip on how to get a faceted scatterplot plot with all points in the background of each plot. This technique makes a clever use of setting the faceting variable to NULL so that all points are plotted in light grey in all the facets. __ ... [Read more...]

I've been invited me to create my account on ohloh [Read more...]

LaTeX is a typesetting language that is known for its beautiful mathematical formulas. It is similar to HTML in that you write your document in plain text and process (or compile) it to create a postscript or PDF file. You will need to download a LaTeX processor for your platform. ... [Read more...]

In designs where there are multiple factors, all with a discrete group of level settings, the full enumeration of all combinations of factor levels is referred to as a full factorial design. As the number of factors increases, potentially along with the settings for the factors, the total number of ... [Read more...]

A Beautiful WWW put together a great set of resources for getting started with machine learning in R.  First, they recommend the previously mentioned free book, The Elements of Statistical Learning.  Then there's a link to a list of dozens of machine learning and statistical learning packages for R.  Next, ... [Read more...]

This is an updated version of yesterday's post with corrected URLs -- by copy-and-pasting I had still referenced the previous slides from UseR! 2009 in Rennes instead of last Friday's slides from the ISM presentation in Tokyo. The presentations page had the correct URLs, and this has been corrected below for ... [Read more...]