Also be aware of the IEEE standard of rounding to even: > round(61000, -4) [1] 60000 > round(62000, -4) [1] 60000 > round(65000, -4) [1] 60000 > round(66000, -4) [1] 70000 > round(76000, -4) [1] 80000 > round(75000, -4) [1] 80000 > notice what 65000 rounds to and what 75000 rounds to. On Tue, Nov 1, 2011 at 4:13 PM, Bert Gunter <gunter.ber...@gene.com> wrote: > Yes, I agree with David that this looks like an error. > > However, for fun, one might ask: what is the fewest number of R elementary > math operations that would produce such a result -- this might be good for > clever 6th or 7th graders, for example. > > For here, I leave this as an exercise for the reader. > > -- Bert > > On Tue, Nov 1, 2011 at 12:42 PM, David Winsemius > <dwinsem...@comcast.net>wrote: > >> >> On Nov 1, 2011, at 1:07 PM, Wendy wrote: >> >> Hi all, >>> >>> I have a list of numbers, e.g., X = c(60593.23, 71631.17, 75320.1), and >>> want >>> to round them so the output is Y = c(60000, 80000, 80000). >>> >> >> Under what notion of "rounding" would that be the result? >> >> I tried >>> Y<-round(X,-4), but it gives me Y = c(60000, 70000, 80000). Do anybody >>> know >>> how to round up a number to 10^4? >>> >>> Thank you in advance. >>> >> >> >> -- >> David Winsemius, MD >> Heritage Laboratories >> West Hartford, CT >> >> ______________________________**________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> >> PLEASE do read the posting guide http://www.R-project.org/** >> posting-guide.html <http://www.R-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > > Bert Gunter > Genentech Nonclinical Biostatistics > > Internal Contact Info: > Phone: 467-7374 > Website: > http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm > > [[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. >
-- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ 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.
