Thank you Michael It is indeed the OS
identical(seq.int(0,1,length.out = 11), seq.int(0,1, by = 0.1)) # FALSE Michael Weylandt wrote > > 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_alexander@> > 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@ 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@ 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-tp4545683p4546134.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.
