So part of the joke is that I literally don’t have slides for my knitr talk, partially because I’m lazy, but mostly because Software Carpentry has emboldened me to present code with livecoding instead of slides.
If you are following along later/from afar, you’re probably going to want to install RStudio (it’s free!) to run through this stuff. I believe it’s possible without it, but will be much less pleasant/productive.