Ray Brownrigg <[EMAIL PROTECTED]> writes: > > 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? > > > How about: > length(table(a)[table(a) == 1])
Also, probably inefficient, but rather neat: > setdiff(a,a[duplicated(a)]) [1] 3 4 5 -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [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
