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@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(.)))))
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