1. You don't need to say truc==T. truc is already a logical vector. 2. colnames are just another vector, so do
colnames(truc)[truc] Dave On 15/06/06, David Hajage <[EMAIL PROTECTED]> wrote: > Hello, > > My problem is quite simply, but I didn't find any solution... > > I have a vector : > > > truc > longueur30 longueur40 longueur50 longueur60 longueur70 longueur80 > longueur90 > 34 FALSE FALSE FALSE FALSE TRUE FALSE > FALSE > > I would like to have the name of the column where there is "TRUE". > > > colnames(truc) > [1] "longueur30" "longueur40" "longueur50" "longueur60" "longueur70" > [6] "longueur80" "longueur90" > > > truc[truc == T] > [1] TRUE > > > colnames(truc[truc == T]) > NULL > > How can I do it ? > > Thank you for your help. > > -- > David > > [[alternative HTML version deleted]] > > ______________________________________________ > 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 > ______________________________________________ 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