FAQ 7.31 Sent from my iPad
On Aug 27, 2011, at 23:59, edwar...@psu.ac.th wrote: > Dear all, > I am happy to accept that > >> is.integer(1) > [1] FALSE > > But I'm having difficulty with this one: > >> as.integer((2.53-2)*100) > [1] 52 > > especially since: > >> as.integer((1.53-1)*100) > [1] 53 > > Although I know that this is a precision issue since > >> x <- (2.53-2)*100 >> x-53 > [1] -2.131628e-14 > > And I can always use the round function to get what I want, but I just > wonder if something is wrong here. > >> sessionInfo() > R version 2.13.1 (2011-07-08) > Platform: i386-pc-mingw32/i386 (32-bit) > > locale: > [1] LC_COLLATE=Thai_Thailand.874 LC_CTYPE=Thai_Thailand.874 > LC_MONETARY=Thai_Thailand.874 > [4] LC_NUMERIC=C LC_TIME=Thai_Thailand.874 > > attached base packages: > [1] stats graphics grDevices utils datasets methods base > > Thanks, > Edward > > > -------------------------------------------------------------------------------------------------------------- > NOTE: Prince of Songkla University will NEVER ask for your PSU Passport/Email > Username or password by e-mail. > If you receive such a message, please report it to report-ph...@psu.ac.th. > -------------------------------------------------------------------------------------------- > @@@@ NEVER reply to any email asking for your PSU Passport/Email or other > personal details. @@@@@ > -------------------------------------------------------------------------------------------- > > For more information, contact the PSU E-Mail Service by dialing 2121 > > ______________________________________________ > 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.
