R FAQ 7.31. http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f
On Thu, Nov 7, 2013 at 8:36 AM, Eckstädt, Elisabeth <elisabeth.ecksta...@tu-dresden.de> wrote: > Hello everyone, > I am experiencing a unfathomable benaviour of "subset" on a data.frame. This > is a minimal reproducable example. The data.frame cosists only of one column, > which contains 10 ascending values (from 0.1 to 1). Subsetting for 0.1 is > working (gives me one row), subsetting for 0.3 gives me zero rows? Doing the > same with values from 1 to 10 is working out well (as expected). > > Beimischung=seq(0.1,1,0.1) > man2=data.frame(Beimischung) > subset(man2, Beimischung==0.3) > #---> gives 0 rows > subset(man2, Beimischung==0.1) > ---> gives one row (as expected)# > > #also not working: > > man2$Beimischung3=man2$Beimischung*10 > subset(man2, Beimischung3==3) > --> gives 0 rows > > Does anybody have a clue for me? > Thanks in advance > Regards > Elisabeth ______________________________________________ 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.
