Hello folks, I found a strangeness while experimenting with POSIXct vectors and lists. It seems that coerced NA's aren't "real" NAs, at least as considered by is.na()?
> date_vec = c(as.POSIXct(now()), as.POSIXct(now()+1),NA,"b") > date_vec [1] "2012-08-22 15:00:46 COT" "2012-08-22 15:00:47 COT" NA [4] NA Warning message: In as.POSIXlt.POSIXct(x, tz) : NAs introduced by coercion > date_vec[4] [1] NA Warning message: In as.POSIXlt.POSIXct(x, tz) : NAs introduced by coercion > is.na(date_vec[4]) [1] FALSE > is.na(date_vec[3]) [1] TRUE > is.POSIXct(date_vec[4]) [1] TRUE ______________________________________________ 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.
