Hi Duncan, On Tue, Jan 26, 2010 at 9:09 PM, Duncan Murdoch <murd...@stats.uwo.ca> wrote: > On 26/01/2010 3:25 PM, Blanford, Glenn wrote: >> >> Has there been any update on R's handling large integers greater than 10^9 >> (between 10^9 and 4x10^9) ? >> >> as.integer() in R 2.9.2 lists this as a restriction but doesnt list the >> actual limit or cause, nor if anyone was looking at fixing it. > > Integers in R are 4 byte signed integers, so the upper limit is 2^31-1. > That's not likely to change soon.
But in the hypothetical scenario that this was to change soon and we were to have 64bit integer type (say, when under a 64 bit OS), wouldn't this allow us to have objects whose length exceeded the 2^31-1 limit? Benilton Carvalho > The double type in R can hold exact integer values up to around 2^52. So for > example calculations like this work fine: > >> x <- 2^50 >> y <- x + 1 >> y-x > [1] 1 > > Just don't ask R to put those values into a 4 byte integer, they won't fit: > >> as.integer(c(x,y)) > [1] NA NA > Warning message: > NAs introduced by coercion > > Duncan Murdoch > >> >> Glenn D Blanford, PhD >> <mailto:glenn.blanf...@us.army.mil> >> Scientific Research Corporation >> gblanf...@scires.com<mailto:gblanf...@scires.com> >> >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.