Looks like R FAQ 7.31 to me. https://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f
On Wed, Sep 9, 2015 at 4:19 AM, DE <david.ecoti...@cerema.fr> wrote: > Hi, > > I'd like to create a date-time seq with a period of 0.05 s, over several > days. > > # try : > start<-strptime(nom_fich,format="%y%m%d") > time<-seq(from=start, by=0.05, length.out = 86400*20*3) > print(as.POSIXlt(time[2])$sec) > # result is 0.04999995 and not 0.05 as expected > > But If I am looking at the sequence, the seconds are not separated by 0.05, > but by something very close (0.04999995). Same pb if I want to add a > fraction of seconds to a date-time object : > > # try : > start<-strptime(nom_fich,format="%y%m%d") > as.POSIXlt(start+0.05,origin="1970-01-01")$sec > # result is 0.04999995 and not 0.05 as expected > > Any idea to solve this pb ? > > Thank you in advance ! > > -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
