On Wed, 29 Aug 2007, Petr Savicky wrote: > The help page for function identical says: > 'identical' sees 'NaN' as different from 'as.double(NA)', but all > 'NaN's are equal (and all 'NA' of the same type are equal). > However, we have > x <- NaN > y <- as.double(NA) > x # [1] NaN > y # [1] NA > identical(x,y) # [1] TRUE > > In my opinion, NaN and as.double(NA) should be distinguished as the > help page suggests.
And sometimes they are: > identical(y,x) [1] FALSE so it is a bug. A quicker version: identical(NaN, NA_real_) == identical(NA_real_, NaN) was false, fixed now, thanks for spotting it. > > Tested under R version 2.5.1 Patched (2007-08-19 r42638) on Linux (CPU Xeon). > > Petr Savicky. > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
