On Thursday, May 07, 2009 7:45 PM, David Freedman wrote: > ...how about: > d=data[order(data$ID,-data$Type),] > d[!duplicated(d$ID),]
Does the "-data$Type" argument to the order function work? -- David ----------------------------------------------------- David Huffer, Ph.D. Senior Statistician CSOSA/Washington, DC david.huf...@csosa.gov ______________________________________________ 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.
