[R] finding duplicates in a data frame

[Rui Barradas]

What are the names of your data.frames columns? Paste the output of the 
following commands in a post:

dput(head(df1, 30))
dput(head(df2, 30))

Tui Barradas

Em 13-06-2012 12:55, Sathya Priya escreveu:
> I got this error while trying your code.. Can you please sort it out
>
> Error in fix.by(by.x, x) : 'by' must specify valid column(s)
>