And please configure your e-mail client not to post in HTML format.
Hope this helps,
Às 22:07 de 02/06/21, Kai Yang via R-help escreveu:
> Hi List,
> I use paste function to concatenate 3 character columns together.
> when I run table to see that, I found 3 categories. How can I write script to trim NA in 2nd and 3rd group and set the first one as NA?
> NA NA NA
> NA NA Adenocarcinoma
> NA Other NA
> [[alternative HTML version deleted]]
> [hidden email] mailing list -- To UNSUBSCRIBE and more, see
> 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.