I am trying to change the mydata$sex from character to numeric I want teh out put like id sex 1 NA 0 2 NA 0 3 M 1 4 F 2 5 M 1 6 F 2 7 F 2
mydata$sex1 <- 0 if(mydata$sex =="M " ){ mydata$sex1<-1 } else { mydata$sex1<-2 } mydata$sex1 Warning message:In if (mydata$sex == "M ") { : the condition has length > 1 and only the first element will be used> mydata$sex1[1] 2 2 2 2 2 2 2 2 > On Fri, Oct 30, 2015 at 8:28 PM, Ista Zahn <istaz...@gmail.com> wrote: > Using numeric for missing sounds like asking for trouble. But if you > must, something like > > mydata$confusingWillCauseProblemsLater <- > ifelse( > is.na(mydata$sex), > 0, > as.numeric(factor(mydata$sex, > levels = c("M", "F")))) > > should do it. > > Best, > Ista > > On Fri, Oct 30, 2015 at 9:15 PM, Val <valkr...@gmail.com> wrote: > > Hi all, > > Iam trying to change character to numeric but have probelm > > > > mydata <- read.table(header=TRUE, text=', sep=" " > > id sex > > 1 NA > > 2 NA > > 3 M > > 4 F > > 5 M > > 6 F > > 7 F > > ') > > > > if sex is missing then sex=0; > > if sex is"M" then sex=1; > > if sex is"F" then sex=2; > > > > Any help please ? > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@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]] ______________________________________________ R-help@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.