Actually, your result is strange, since if x = 0.55 then a hexadecimal representation of x*100 is 404B8000 00000001 which is above 55, meaning that x is above 0.55 and should have been rounded to 0.6, while if x = 2.55 then the hexadecimal representation of x*100 is 406FDFFF FFFFFFFF which is below 255, so that x is less than 2.55 and should have been rounded to 2.5.
--- On Fri, 11/7/08, Moshe Olshansky <[EMAIL PROTECTED]> wrote: > From: Moshe Olshansky <[EMAIL PROTECTED]> > Subject: Re: [R] rounding > To: [EMAIL PROTECTED], "Korn, Ed (NIH/NCI) [E]" <[EMAIL PROTECTED]> > Received: Friday, 11 July, 2008, 10:39 AM > The problem is that neither 0.55 nor 2.55 are exact machine > numbers (the computer uses binary representation), so it > may happen that the machine representation of 0.55 is > slightly less than 0.55 while the machine representation of > 2.55 is slightly above 2.55. > > > --- On Fri, 11/7/08, Korn, Ed (NIH/NCI) [E] > <[EMAIL PROTECTED]> wrote: > > > From: Korn, Ed (NIH/NCI) [E] > <[EMAIL PROTECTED]> > > Subject: [R] rounding > > To: [EMAIL PROTECTED] > > Received: Friday, 11 July, 2008, 6:07 AM > > Hi, > > > > Round(0.55,1)=0.5 > > > > Round(2.55,1)=2.6 > > > > Can this be right? > > > > Thanks, > > > > Ed > > > > [[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.
