?which Use it to find the rows and then extract the rows
selection <- mydata[which(mydata$id=="25-2006"), ] should work. --- Leonardo Lami <[EMAIL PROTECTED]> wrote: > 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.
