For a while now I’ve been thinking that, yes, ggplot2 is awesome and offers a lot of geoms and stats, but it would be great if it could be extended with new user-generated geoms and stats. Then I learnt that ggplot2 actually has a pretty great extension system so ...

While trying to build a circular colour scale to plot angles and wind direction, I stumbled upon an easy way to make shaded reliefs in R. You known, when you look at cool maps of mountain areas where peaks and valleys are easily distinguishable from their shadows like this: What ...