For the blow sample data, I am trying to use the if statement to create a new column called newcol. I would like to condition the newcol on the Letter column such that if the Letter is NA then newcol is TRUE. How can I do this using if command without loading any libraries?
Thanks,
MRR
M <- data.frame(c("A","B","C",NA),c(5,100,NA,60))
names(M) <- c("Letter","Number")
CodePudding user response:
Try using is.na
:
M$newcol <- is.na(M$Letter)