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.
