On Wed, Dec 1, 2010 at 9:02 AM, Ben Bolker <bbol...@gmail.com> wrote: > > > Peter Ehlers <ehlers <at> ucalgary.ca> writes: > >> >> It might be a good idea not to use an outdated version of R. >> I don't see your "problem" in R 2.12.0. >> >> Peter Ehlers >> >> On 2010-12-01 05:44, Jean.Coursol <at> math.u-psud.fr wrote: >> > Just for fun >> > >> > This small program gives negative Sum of Sq in anova (with R versions >> > 2.9.2 and 2.10.0) (linux 32 kernel 2.6.29.6-smp slackware 13.0) : >> > > > These are essentially just round-off error in a problem with zero > noise: there is absolutely no practical difference between 2e-16 and > 2e16.
Well, actually there is a big difference between 2e-16 and 2e16. I think you meant to write 2e-16 and -2e-16 > If you really need to do something with these values that will > break if they are negative, see ?zapsmall ... > > ______________________________________________ > 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.
