Please do read the R FAQ: "Why doesn't R think these numbers are equal?"
and before posting, you should have read the R FAQ: "What is a bug?" that points you to the former FAQ! Uwe Ligges [EMAIL PROTECTED] wrote: > I am using R Version 2.6.2007-11-23. I do not know if the problem exists > for other values or versions > > I encountered a problem when searching for the number 0.94 and 0.95 in a > vector of values. I illustrate it below by creating a sequence of values 2 > ways and then looking for the value 0.94 (same result for 0.95). It looks > like the vector generated by seq( ) is a bit off: > >> a<-seq(.9,.95,by=.01) >> a > [1] 0.90 0.91 0.92 0.93 0.94 0.95 > >> b<-c(.90,.91,.92,.93,.94,.95) >> b > [1] 0.90 0.91 0.92 0.93 0.94 0.95 > >> a==.94 > [1] FALSE FALSE FALSE FALSE FALSE FALSE >> b==.94 > [1] FALSE FALSE FALSE FALSE TRUE FALSE > >> a-b > [1] 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 1.110223e-16 > [6] 1.110223e-16 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
