Someone was wrong on the internet! But actually we were talking at cross-purposes, and after I put up this picture we worked out the error. It’s connected with Lewandowsky’s paper: basically the two lines of code you don’t understand give you the results of the factor analysis of CO2-related questions in Lewandowsky’s study.
Funnily enough, I didn’t really understand the download bit, I just copy-pasted. Specialization, eh?
(Incidentally, since you probably don’t do it yourself: that environment you see in that picture is what we statisticians see for hours of every day of our lives. I use Stata so mine is a bit prettier, but that’s my life in a nutshell…)