Assuming that id is a character. tab[tab$id == "25-2006", ]
Cheers, Thierry ------------------------------------------------------------------------ ---- ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance Gaverstraat 4 9500 Geraardsbergen Belgium tel. + 32 54/436 185 [EMAIL PROTECTED] www.inbo.be Do not put your faith in what statistics say until you have carefully considered what they do not say. ~William W. Watt A statistical analysis, properly conducted, is a delicate dissection of uncertainties, a surgery of suppositions. ~M.J.Moroney > -----Oorspronkelijk bericht----- > Van: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Namens Leonardo Lami > Verzonden: dinsdag 3 juli 2007 11:34 > Aan: r-help@stat.math.ethz.ch > Onderwerp: [R] select row > > Hi all, > I have a little problem selecting some rows from a data.frame. > I'd like to select the rows where a determinated column take > a partivolar value. > > For example: > tab > id x y > 1 24-2005 1621814 4834991 > 2 24-2005 1621856 4834907 > 3 24-2005 1621763 4834956 > 4 25-2006 1622330 4835189 > 5 25-2006 1622533 4834834 > 6 25-2006 1622535 4834909 > 7 25-2006 1622543 4834803 > 8 28-2005 1622798 4835043 > 9 28-2005 1622299 4835129 > > I'd like to select the row where id=25-2006 > > I searched on the search of the R site but I did'nt find > anything of simple. > Can someone help me? > > Thank you very much > Leonardo > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.