r-cartogramR

Continuous Cartogram.

Installation

Install cartogramR from CRAN with:

install.packages("cartogramR")

For windows users, the CRAN distributes a compiled package and there is no need to install it from source. If you install package from sources, you will need FFTW. This library is fairly common thus a package for it is usually available (linux: see fftw-devel (rpm), fftw-dev (deb); Mac OS X: fftw (brew)).

Usage

For example cartogram for the number of electors in the USA in 1964:

1. Load package, data and verify that at least one grid point fall in each region (the smallest region is Washington DC)

   library(cartogramR)
   data(usa)
   plot(precartogramR(usa))
   

2. The default grid size $L=512$ is OK, thus we can run the cartogram for variable electors64 and plot the cartogram:

   carto <- cartogramR(usa, "electors64")
   plot(carto)
   

Acknowledgements

• Many many thanks to Michael T. Gastner for his flow based cartogram programs on which cartogramR is (heavily) based
• Timothée GIRAUD UMS 2414 RIATE / CNRS Paris, for suggestions and careful reading.