Example of using R grid graphics to plot US flag.
At our weekly R and Python study group, the idea came up to try to plot the US flag in R using ggplot2. While that may be possible, I chose to do it using grid, which is the graphics library ggplot2 is built on. Here's my solution.
Flag specifications http://www.vexman.net/flagspec.htm
source("us-flag.R")