[R] replace NA into - for specific column

[Kai Yang]

 Hello Jim,Your example works well.Thank you for your help,Kai
    On Tuesday, June 1, 2021, 04:59:09 PM PDT, Kai Yang via R-help <r-help using r-project.org> wrote:  
 
 Hi List,
I have a column MMR in a data frame proband_crc2. The column contents missing value and + (means positive). 
I need to replace all missing value into - (means negative)
I did try with difference ways.  Below are my testing, but not any one works. Can someone help me?
Thanks,
Kai
proband_crc2 %>% mutate(MMR=recode(MMR, '' = "-"))
proband_crc2            <- data.frame (ifelse(proband_crc2$MMR !="+", "-", NA))
proband_crc2$MMR <- ifelse(MMR %in% c(""," ","-"), NA, MMR)
proband_crc2$MMR[proband_crc2$MMR==NA] <- "-"
proband_crc2           <- data.frame( proband_crc2 %>% mutate(across(c("MMR"), ~ifelse(.==NA, "-", as.character(.)))))


    [[alternative HTML version deleted]]

______________________________________________
R-help using r-project.org 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.
  
	[[alternative HTML version deleted]]