Version 0.3.2 of psychonetrics is now on CRAN! This means that the package can now be installed easily from R and that the automatically generated manual is online. For more notes on how to install psychonetrics, please see the installation guide on this website. Note that this page also explains how ... [Read more...]

This blog was written by Sacha Epskamp. In my class on Structural Equation Modeling, I introduce the concepts of expected values and variances through the game of roulette. A french roulette game looks like this: A ball will roll in the left basin and land on one of the 37 values. ... [Read more...]

Create HTML page containing all package examples using knitr and markdown body, td { font-family: sans-serif; background-color: white; font-size: 12px; margin: 8px; } tt, code, pre { font-family: 'DejaVu Sans Mono', 'Droid San... [Read more...]

Last week I have updated the ‘qgraph‘ package to version 1.1.0, available on CRAN now. Besides some internal changes (especially the self-loops have been substantially improved) the most important change is the addition of a GUI interface, which can be … Continue reading → [Read more...]

Yesterday I found out about ‘mplayer’, which is a movie/music player for Unix that can be completely controlled from the terminal (http://www.mplayerhq.hu/). I started playing around with it while at the same time learning reference classes. The result, a music … Continue reading → [Read more...]

I was browsing stackoverflow when suddenly I noticed: 10 thousand questions tagged! I started using Stackoverflow almost exactly a year ago and remember that the counter was about 3 thousand at the time. It is a beautiful example of how fast the R community is … Continue reading → [Read more...]

When I was making the slides for a lecture on using Sweave to incorporate R and LaTeX I was unpleasantly surprised at how tedious it can be to extract statistical values and print them in proper LaTeX code. For example, consider a … Continue reading → [Read more...]

I have given a course on using LaTeX for psychological researchers. This course consisted of four lectures in which I discussed the following subjects: how to obtain a LaTeX distribution How to use LaTeX to write professional scientific reports How to use … Continue reading → [Read more...]