Thanks so much Jorge and Pete !
Pete Brecknock wrote
>
>
> frame2$age = frame1[match(frame2$ID, frame1$ID),"age"]
>
>
This match function was exactly what I needed to know!
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View this message in context:
http://r.789695.n4.nabble.com/add-column-with-values-found-in-another-data-frame-tp4
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
2 matches
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