One way to learn is to imitate. Monkey see monkey do. After copying some skills, adapt and modify, and hopefully gain mastery.
Link teaches how to compare two regression slopes by ANCOVA
Exploring and venting about quantitative issues
Using large digital libraries to advance literary history
Zoom out, zoom in, zoom out.
Blog to document and reflect on Columbia Data Science Class
A Quick-R Companion
[R] + applied economics.
Scientific computing, data viz and general geekery, with examples in R and MATLAB.