What difference is it you are worried about:? identical(seq.int(0,1,length.out = 11), seq.int(0,1, by = 0.1)) # TRUE
Though that may be OS dependent. M On Tue, Apr 10, 2012 at 10:51 AM, Alexander <juschitz_alexan...@yahoo.de> wrote: > > Berend Hasselman wrote >> >> On 10-04-2012, at 15:54, Alexander wrote: >> >>> I am working under R2.11.1 Windows and I was wondering why there is a >>> difference between >>> >>> seq.int(0,1,by=0.1)[4]-0.3 >>> seq.int(0,1,length.out=11)[4]-0.3 >>> >>> there is also the fact that >>> >>> seq(0,1,by=0.1)[4]-0.3 >>> seq(0,1,length.out=11)[4]-0.3 >>> >>> but I think this can be explained by floating precision... >> >> >> R FAQ: http://cran.r-project.org/doc/FAQ/R-FAQ.html >> >> 7.31 Why doesn't R think these numbers are equal? >> > This explains what the difference, but the problem for > > seq(2)*seq(2)==2 > > is not the same as > > 0.3+0.1-0.4==0 > > There must be a difference in the calculation for by and length.out in > seq.int otherwise there wouldn't be a difference in seq.int > > seq.int(0,1,length.out=11)[4]-seq.int(0,1,by=0.1)[4] > > I am more interested in the generation of the sequence... > > > Berend Hasselman wrote >> >> Berend >> >> >> >> >> ______________________________________________ >> R-help@ 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. >> > > > -- > View this message in context: > http://r.789695.n4.nabble.com/R2-11-1-seq-int-difference-between-by-and-length-out-tp4545683p4545854.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.
