Command to see 'R' path that RStudio is using

Question

Original Question

This seems easy and has likely been asked before, but I could not find it via a search.

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I have a few flavors of R inst

Answer 1

(Edited to reflect fact that this is apparently a Windows-specific solution.)

Here on Windows, I'd use the following, for reasons discussed here by Henrik Bengtsson near the start of a long thread on the subject.

file.path(R.home("bin"), "R")

This is better than using file.path(R.home(), "bin", "R") in several settings alluded to in the "Value" section of this snippet from help(R.home):

Details:

The R home directory is the top-level directory of the R installation being run.

[...]

Value:

A character string giving the R home directory or path to a particular component. Normally the components are all subdirectories of the R home directory, but this may not be the case in a Unix-like installation. [...] The return value for "modules" and on Windows "bin" is to a sub-architecture-specific location.