Dear R-Helpers,
Why does R show character missing values in vectors as NA and when
stored in a data frame as <NA>? I've searched but did not find an
explanation.
Thanks,
Bob
> gender <- c("f","f","f",NA,"m","m","m","m")
> gender
[1] "f" "f" "f" NA "m" "m" "m" "m" #here it lacks brackets.
>
> q1 <- c(1,2,2,3,4,5,5,4)
> q1
[1] 1 2 2 3 4 5 5 4
>
> myDF <- data.frame(q1,gender)
> myDF
q1 gender
1 1 f
2 2 f
3 2 f
4 3 <NA> #here it has brackets.
5 4 m
6 5 m
7 5 m
8 4 m
=========================================================
Bob Muenchen (pronounced Min'-chen),
Manager, Statistical Consulting Center
U of TN Office of Information Technology
Stokely Management Center, Suite 200
916 Volunteer Blvd., Knoxville, TN 37996-0520
Voice: (865) 974-5230
FAX: (865) 974-4810
Email: [EMAIL PROTECTED]
Web: http://oit.utk.edu/scc
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News: http://listserv.utk.edu/archives/statnews.html
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