I have a vector containing NULL. Referencing to that NULL gives me NA instead, which disrupt my codes. How can i preserve NULL as it is ?
> res <- c(1,2,NULL) > res[1] [1] 1 > res[2] [1] 2 > res[3] [1] NA ______________________________________________ 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.
