R versions and associated libraries

Question

When I switch R versions in RStudio will the package/library versions associated with that R version be used? My libraries are in “c:\users\user1\Documents\R\win-library” with directories for each R version on my machine. There is also a library directory in the R version location (e.g. “c:\Program Files\R\R-3.6.3\library”). The ".libPaths()" function will list both of these locations. Because there are different library directories for each version I assume they are tied together, therefore if I switch R versions the associated libraries with that version are used.

Answer 1

I am not sure I understand all the details of the problem you are attempting to solve. But, since nobody else has answered, here's an idea...

Perhaps you could speed up processing using something akin to a Lawson's walk across the Delaunay. A walk algorithm would allow you to use geometry constraints to reduce your overall search space. To illustrate the walk concept, here is a picture taken from the Tinfour project. The walk begins at a known position and traverses the Delaunay in the direction of a goal. The result is close to the shortest number of "hops" between the two points.

While Tinfour is strictly a 2D Delaunay solution, you might find something similar in the excellent Computational Geometry Algorithms Library