On Wed, 4 Apr 2007, John Kane wrote: > I have a very simple problem and am completely missing > the solution. > I have two character variables (character ID's from > two datasets) Data set 'b' > is data set 'a' with one more subject added. > How do I find out which is the added subject?
setdiff( b, a ) ?? > > I have tried duplicated and unique without much > success. I can find all the > duplicated ID's but how do I extract the new "unique" > one? > Example: > a <- as.character(Cs(b,d,c,a)) > b <- as.character( Cs(a,b,c,d,e)) > h <- c(a,b) ; h > h[duplicated(h)] > > I just want to extract that "e"! > > I had thought that > h[!duplicated(h)] > might work but it simply returns all the unique values > whereas > I simply want to simply find the odd man out. > > I thought of using sorting the vectors & using a cbind > but the id's are assigned > more or less randomly so that didn't work. > > Thanks > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > Charles C. Berry (858) 534-2098 Dept of Family/Preventive Medicine E mailto:[EMAIL PROTECTED] UC San Diego http://biostat.ucsd.edu/~cberry/ La Jolla, San Diego 92093-0901 ______________________________________________ R-help@stat.math.ethz.ch 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.