Full_Name: c fillekes Version: Version 2.2.1 (2005-12-20 r36812) OS: Gentoo Linux kernel 2.6.12 Submission from: (NULL) (129.116.71.233)
"Not Available" is of course not a numeric: R > is.numeric (NA) [1] FALSE But for some reason, all arithmetic operations on NA's are in fact numeric, even if it's with other NA's. > is.numeric (NA+NA) [1] TRUE > is.numeric (NA^2) [1] TRUE > is.numeric (NA-NA) [1] TRUE > is.numeric (NA*NA) [1] TRUE > is.numeric (NA/NA) [1] TRUE > This is not the expected thing. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
