Get a two-digit version of the R version
twodigitRversion(Rversion = R.version)Version of R (only used if type is not source.) Defaults to R.version, but this can be specified as any of the following formats:
a character string with the two digit R version, e.g. "3.1"
a list with components major and minor
the result of getRversion()
the result of R.version
A character string representing the two-digit R version.