On Fri, 23 Jul 2004, Guazzetti Stefano wrote:
> sorry for my previus (WRONG)
> answer, as someone already pointed out
> a solution could be
>
> subset(data, PUNTAR==c("IX49","IX48"))
That's still wrong. You want PUNTAR %in% c("IX49","IX48"). Using ==
recycles entries, so it tests the first element against "IX49", the second
against "IX48", the third against "IX49" ....
> > -----Messaggio originale-----
> > Da: Guazzetti Stefano
> > Inviato: venerd� 23 luglio 2004 15.55
> > A: 'Luis Rideau Cruz'; [EMAIL PROTECTED]
> > Oggetto: R: [R] retrieve rows from frame assuming criterion
> >
> >
> > Assuming your data.frame is called "data"
> >
> > data[data$PUNTAR==c("IX49","IX48"),]
> >
> > is probably what you want
> >
> > Stefano
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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