library(ggplot2) library(swemaps) library(rkolada) # devtools::install_github("reinholdsson/rkolada") # function to merge kolada data with map data from swemaps ...

## source: This script is based on different bits of code from other people with amazing R skills: airports <- read.csv("http://www.stanford.edu/~cengel/cgi-bin ...

This week we cover ggplot, the grammar of graphics. ggplot is complicated at first but the payoff is worth the effort. ggplot can be combined with other tools to create interactive visualizations. The ...