On 7/9/07, Peter Dalgaard <[EMAIL PROTECTED]> wrote:
> Andrew Yee wrote:
> > Thanks. But in this specific case, I would like the output to include
> > all three columns, including the "ignored" column (in this case, I'd
> > like it to ignore column a).
> >
> df[!duplicated(df[,c("a","c")]),]
>
> or perhaps
>
> df[!duplicated(df[-2]),]
Yes - of course. I was momentarily confused about unique vs. duplicated. Oops!
Hadley
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