Precision, precision, precision... > z[2]-0.15 [1] 2.775558e-17
My solution: > z <- signif(seq(.05,.85,by=.1), 5) > z[2] - 0.15 [1] 0 > z[2]==0.15 [1] TRUE Peter On Thu, Jul 3, 2014 at 11:28 AM, Matthew Keller <mckellerc...@gmail.com> wrote: > Hi all, > > A bit stumped here. > > z <- seq(.05,.85,by=.1) > z==.05 #good > [1] TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE > > z==.15 #huh???? > [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE > > More generally: >> sum(z==.25) > [1] 1 >> sum(z==.35) > [1] 0 >> sum(z==.45) > [1] 1 >> sum(z==.55) > [1] 1 >> sum(z==.65) > [1] 0 >> sum(z==.75) > [1] 0 >> sum(z==.85) > [1] 1 > > Does anyone have any ideas what is going on here? > >> R.Version() > $platform > [1] "x86_64-apple-darwin9.8.0" > > $arch > [1] "x86_64" > > $os > [1] "darwin9.8.0" > > $system > [1] "x86_64, darwin9.8.0" > > $status > [1] "" > > $major > [1] "2" > > $minor > [1] "13.1" > > $year > [1] "2011" > > $month > [1] "07" > > $day > [1] "08" > > $`svn rev` > [1] "56322" > > $language > [1] "R" > > $version.string > [1] "R version 2.13.1 (2011-07-08)" > > -- > Matthew C Keller > Asst. Professor of Psychology > University of Colorado at Boulder > www.matthewckeller.com > > [[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.
