Am 28.07.2010 07:36, schrieb jd6688: > > DF1 > name OTHER > ABC O > KKK O > QQQ O > DDD O > PPP O > > DF2 > name > ABC > KKK > DDD > > If the names in df1 mapped the names in df2, then add the mapped name to df1 > as a separate column, for instance "mappedColumn"
What do you mean by "mapped": (1) how often a name in df1 is present or (2) whether a name of DF1 is existing in DF2? for (1) you could use DF1$existsinDF2<-DF1$name%in%DF2$name for (2) use either aggregate or table (type ?aggregate or ?table at command prompt for help. Stefan ______________________________________________ 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.
