Category Archives: Recommended

Recommended: lavaan tutorial

I have not run too many Structural Equation Modeling (SEM), so I can’t comment too much about this resource, but anytime I see something like SEM features added to R, I have to rejoice. This page gives a nice tutorial introduction to lavaan, the R package for SEM, and the material is pitched at a level easy to follow even for people like me who have a limited appreciation for SEM terminology. Continue reading

Recommended: r2d3: R Interface to D3 Visualizations

There’s an interesting visualization system called d3, that I only became aware of a few months ago. It uses a fairly minimal system, javascript and support vector graphics, but is capable of producing tremendously rich graphics. I’ve tried, when I have a few spare moments, to learn d3. It’s not that complicated, but I am hindered by a lack of knowledge about javascript. It’s also difficult to debug a d3 program. There’s a new library in R that should make things a bit easier for someone like me. It’s called r2d3 and is being promoted with the new preview release of RStudio. Continue reading

Recommended: How to Clone Your Raspberry Pi SD Cards With Windows

I’m building a cluster of Raspberry Pi computers to run Hadoop and one of the tasks that I need is to make working backups of the micro SD cards that these computers use to store their operating system. This page takes you carefully through all the steps you need to make a backup and then to restore it to a different micro SD card. Continue reading

Recommended: A Review of Published Analyses of Case-Cohort Studies and Recommendations for Future Reporting

I got a question about how to analyze a case cohort study in Stata. The person was following the code in a Stata conference presentation but was unsure about some of the details. Always looking for simple explanations that I myself don’t understand well, I found this nice article on how these case cohort studies are written up in the literature. Naturally, it provides a brief explanation of how you analyze data from a case cohort design along with several helpful references. Continue reading