I'm trying find libraries for R that would find the shortest route between two locations, given a
SpatialLinesDataFrame representing the road network. All I could find was stplanr, which delegates the routing to external services such as CycleStreets.net (which does not cover the area I'm interested in) or GraphHopper (which is expensive).
What am I missing? Are there open routing packages for R available on GitHub or CRAN?
(My preference on an R package is due to the routing solution being a part of a larger application, and a native lib would be easier to integrate.)