Dear all, just a stupid R question, since the results puzzle me a bit:
> sum(c(NA,NA), na.rm=TRUE) [1] 0 > NA + NA [1] NA > NA + 1 [1] NA > Why does sum(c(NA,NA), na.rm=TRUE) return 0 and not NA? Thanks in advance, Will ______________________________________________ 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.
