compare_r_version: Compare current R version with a specified one
Description
Determine if R is older (return -1), or not (return 0 if equal,
or 1 if newer) than a given version number.
Usage
compare_r_version(version)
compareRVersion(version)
Arguments
version
A string defining the version to compare to, like '2.0.0' or
'1.9.1'.
Value
-1 if R is older, 0 if equal, 1 if newer. Take care: if you specify
version as "2.11", and R is version "2.11.0", then the function will return 1
(newer)!