On 6/20/07, Manuele Pesenti <amicogodzilla@bruttocarattere.org> wrote:
>
> how can I update a data.frame adding new lines?


rbind


> I need to create a second data frame from a first one with only some of
> their
> entrys filtering the value of a specific column... How can I do this?


dtf2 <- dtf1[dtf1$col=='xxx',]

-- 
Christophe Pallier (http://www.pallier.org)

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