> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of tedzzx > Sent: Saturday, February 28, 2009 4:58 AM > To: r-help@r-project.org > Subject: [R] rounding problem > > > Hi all, > > According to the help page on round(), round(1.5) could be > either 1 or 2. > But I want to the answere to be 2 for sure just what we > usually do. How can > I do that? Thanks advance. > > Cheers > > Ted > --
Ted, Actually, the documentation (at least for R-2.8.1) doesn't say that. The number 1.5 can be represented exactly on most systems that I know, and therefore it will round to the even digit, i.e. round(1.5) = 2.0 . The documentation says that 0.15 cannot be represented exactly, and therefore whether it rounds to 0.1 or 0.2 depends on the OS and the machine architecture. So on my WinXP Pentium IV system, 1.5 rounds to 2.0 and it also happens that round(0.15, 1) equals 0.2 . You say you want 1.5 to round to 2.0. What would you like the result of round(2.5) to equal? Dan Daniel Nordlund Bothell, WA USA ______________________________________________ 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.
