Here are weblinks to provide additional resources so that you can complete the below exercises:
Click on the following links, which will open in a new window.
Exercise 1: Download and install RStudio
RStudio is an integrated development environment (IDE) for R that provides many useful features, including dedicated tabs for packages and plots, an editor for R scripts, a workspace window to view the objects in your current project, a searchable command history, and more.
Exercise 2: Import and map vector data
Visit http://www.naturalearthdata.com/downloads/ to import a world map into R
Exercise 3: Geocoding and web mapping using the ggmap package
You can get a good overview of the available functions and some examples of how they can be used by going to the PDF manual associated with the ggmap package.
Exercise 4: Mapping with the GISTools package
Documentation on the GISTools package can be found at https://cran.r-project.org/web/packages/GISTools/GISTools.pdf
Exercise 5: Mapping Twitter data with R
For this exercise we once again return to the streamR package.
Exercise 6: Using R with GRASS
For more on using R in GRASS, see https://grasswiki.osgeo.org/wiki/R_statistics/rgrass7
Exercise 7: Creating an interactive web map in R with Shiny
For tutorials, reference, and a gallery of existing projects made with Shiny, go to http://shiny.rstudio.com/