Best way to determine if you're running 32 or 64 bit R on windows

Jeffrey Horner <jeffrey.horner <at> gmail.com> writes:

Is this sufficient?

if (.Machine$sizeof.pointer==4){
  cat('32\n')
} else {
  cat('64\n')
}

Or is it better to test something in R.version, say os?

No, the above is perfect,  as it also works on other platforms to distinguish
32-bit and 64-bit.

Regards, Martin