Here is the link to a ggplot2 demo I presented at the InveRness RUG last week :
It’s in ioslides (html) format, for best viewing press F on your keyboard for full screen, and toggle widescreen on/off with the W key.
It’s for beginners / those new to ggplot2.
This is just scratching the surface of this amazing package.
Hope this helps get you started..