Hi Michael, this is R-FAQ 7.31 http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f
cheers. Am 01.02.2011 14:49, schrieb mlancee: > > Hi, > > I have a seemingly easy question that has been keeping be busy for quite a > while. The problem is the following: > > 0.1 + 0.1 + 0.1 == 0.3 > [1] FALSE > > Why is this false? Another example is > > 0.2 + 0.1 == 0.3 > [1] FALSE > > or > > 0.25 + 0.05 == 0.20 + 0.10 > [1] FALSE > > However, I do get TRUE if I use integers, or for example the following > > 0.1 + 0.1 == 0.2 > [1] TRUE > > It is probably something very basic, but I did not manage to find the > answer. > > Thanks, > Michael -- Eik Vettorazzi Institut für Medizinische Biometrie und Epidemiologie Universitätsklinikum Hamburg-Eppendorf Martinistr. 52 20246 Hamburg T ++49/40/7410-58243 F ++49/40/7410-57790 ______________________________________________ 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.
