On Thu, 2004-12-16 at 13:40 -0800, Jun Ding wrote: > Hi, > I am just wondering if there is an easy way to count > in a numeric vector how many numbers don't have > replicates. > For example, > a=c(1,1,2,2,3,4,5), how can I know there are three > numbers (3, 4 and 5) without replicates? > > Thank you! > > Jun
How about: > as.vector(which(table(a) == 1)) [1] 3 4 5 HTH, Marc Schwartz ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
