> > Thank you all very much for your help! > Yes, the unlist or as.logical command is what I was looking for.
Anyway, Duncan, the sapply is also usefull and I might need it some other time. Thanks, Michael, also for the tip that if you get a vector when a list is expected, that the the program will probably continue to work. Thanks again, Marion [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org 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.