Hi Kai,
Maybe this will help:
proband_crc2<-data.frame(MMR=rep(c(NA,"+"),3))
proband_crc2
proband_crc2$MMR[is.na(proband_crc2$MMR)]<-"-"
proband_crc2
Jim
On Wed, Jun 2, 2021 at 9:59 AM 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(.)))))
>
>
> [[alternative HTML version deleted]]
>
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