Thanks for your reply. In your last step If I create a duplicate ( two similar records ) # create a duplicate vv[8,1] <- 7 vv[8,2]<-'g'
and then I merge vv with vv2 ,both duplicates are merged. Is there a way to tell R to merge only the unique records. ------ I don't think merge will do what you are asking. Suspect you would need to do it either before the merge or after. I tried using the Extract operator on a merged dataset, but only succeeded in omitting the duplicated items, not both instances. -- David Winsemius -- View this message in context: http://www.nabble.com/merging-two-data-sets-with-no-column-header-tp17613296p17639592.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.
