Hi Option one
vec1<-sample(letters[1:10]) vec2<-vec1[-5] vec2<-c(vec2,NA) # missing position mis<-which(!(vec1 %in% vec2)) c(vec2[1:(mis-1)], NA,vec2[mis:((length(vec2)-1))]) [1] "f" "e" "g" "d" NA "j" "c" "i" "b" "h" gives you desired vector. For two or more values missing it shall be rephrased probably by rle Option two mis<-which(!(vec1 %in% vec2)) vec2 <- vec1 vec2 [mis] <-NA Which could be used in case of several values missing. But I wonder what you want to achieve. It seems to me like you want to do something for which merge can be used. See ?merge Regards Petr r-help-boun...@r-project.org napsal dne 02.02.2010 16:34:23: > > Hello everyone, > I have two vectors having only one element different: > vector1 vector2 > vector1 > > TWC TWC > TWC > VFC TWX > NA > VIA/B VFC > VFC > WHR VIA/B > VIA/B > WPO WHR --------->>> WHR > WYN WPO > WPO > WYNN WYN > WYN > YUM WYNN > WYNN > NA YUM > YUM > In that case, in the first vector, the value twx is missing . What I want to > do is doing the following avoiding loop: > putting the NA row in front of the TWX row as this would be the row where > the value is missing. I don't know if there is any function doing this. I > thought about using a which() function to retrieve all the missing elements > index ( twx, 1 here) and insert them in the right index in the first vector > but how can I insert in a vector, is there an appropriated function? thank > you > > ----- > Anna Lippel > -- > View this message in context: http://n4.nabble.com/Finding-the-difference- > between-two-vectors-tp1460020p1460020.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > 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. ______________________________________________ R-help@r-project.org mailing list 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.
