The nodes of Contiguous USA Graph represent the 49 contiguous states
of the USA. Two nodes are connected if there exists at least one driveable
road between the corresponding states.
Usage
usastates
Arguments
Format
A data frame with 107 observations and 2 columns.
References
D. E. Knuth (2008)
The Art of Computer Programming, Volume 4, Fascicle 0:
Introduction to Combinatorial Functions and Boolean Functions,
p. 15.
Upper Saddle River, NJ: Addison-Wesley.