R help - Jul 2004 - R: retrieve rows from frame assuming criterion [corrected]

sorry for my previus (WRONG)
answer, as someone already pointed out
a solution could be

subset(data, PUNTAR==c("IX49","IX48"))


> -----Messaggio originale-----
> Da: Guazzetti Stefano 
> Inviato: venerd?? 23 luglio 2004 15.55
> A: 'Luis Rideau Cruz'; r-help at stat.math.ethz.ch
> 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
> 
> 
> 
> > -----Messaggio originale-----
> > Da: Luis Rideau Cruz [mailto:Luisr at frs.fo]
> > Inviato: venerd?? 23 luglio 2004 15.37
> > A: r-help at stat.math.ethz.ch
> > Oggetto: [R] retrieve rows from frame assuming criterion
> > 
> > 
> > Hi all,
> > 
> > I have a data frame in which one column(PUNTAR) is of 
> character type.
> > What I want is to retrieve is the frame but only with those 
> > rows matching elements of PUNTAR with a list characters (e.g 
> > c("IX49","IX48") )
> > 
> > Year    TUR  STODNR   PUNTAR
> > 1994  9412 94020061     IX49
> > 1994  9412 94020062     IX48
> > 1994  9412 94020063      X32
> > 1994  9412 94020065      X23
> > 1994  9412 94020066      X27
> > 1994  9412 94020067     XI19
> > 1994  9412 94020068     XI16
> > 1994  9412 94020069     XI14
> > 1994  9412 94020070      XI8
> > 1994  9412 94020071      X25
> > 1994  9412 94020072      X18
> > 1994  9412 94020073     II23
> > 1994  9412 94020074    XII33
> > 1994  9412 94020075    XII31
> > 
> > "my.function"("frame") should be then equal to 
> > 
> > Year TURNR   STODNR M_PUNTAR
> > 1994  9412 94020061     IX49
> > 1994  9412 94020062     IX48
> > 
> > Thank you in advance
> > 
> > 
> > Luis Ridao Cruz
> > Fiskiranns??knarstovan
> > N??at??n 1
> > P.O. Box 3051
> > FR-110 T??rshavn
> > Faroe Islands
> > Phone:             +298 353900
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> > Mobile:             +298 580800
> > Fax:                 +298 353901
> > E-mail:              luisr at frs.fo
> > Web:                www.frs.fo
> > 
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> > PLEASE do read the posting guide! 
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>

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'; r-help at stat.math.ethz.ch
> > 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,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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