I am positive this problem has a very simple solution, but I have been unable to find it, so I am asking for your help. I need to know how to look something up in one data frame and add it as a column in another. If I have a data frame that looks like this:
> frame1 ID score test age 1 Guy1 10 1 20 2 Guy1 13 2 20 3 Guy2 9 1 33 4 Guy2 11 2 33 and another frame that looks like this: > frame2 ID 1 Guy1 2 Guy2 How do I add a column to frame2 so it looks like this: ID age 1 Guy1 20 2 Guy2 33 I know this must be simple, but I couldn't find the solution by searching. thanks so much Jeremy -- View this message in context: http://r.789695.n4.nabble.com/add-column-with-values-found-in-another-data-frame-tp4295626p4295626.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.
