On Fri, Feb 12, 2010 at 12:06 PM, Simon Urbanek <simon.urba...@r-project.org> wrote: > > On Feb 12, 2010, at 12:33 , blue sky wrote: > >> R-exts.pdf dosen't list many types that are supported in C++, for example, >> long. Are there storage.mode corresponds to those extra types? >> > > There are none - that's why they are not listed. As for long: on 32-bit > platforms (and Win64) int and long are equivalent so you can simply use > INTSXP. On 64-bit unix platforms (LP64) there is no way to losslessly use it > (other than raw) but in most applications you can simply use REALSXP as it > gives you at least 52-bits of precision which its sufficient for most > applications.
According to ?integer, "Note that on *almost* all implementations of R the range of representable integers is restricted to about +/-2*10^9: ‘double’s can hold much larger integers exactly." It uses 'almost'. I'm wondering on what platform integer is not restricted to about +/-2*10^9 so that double's can not hold large integers exactly? ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
