You can build the data frame with: dat <- data.frame(Class=I("Id_TrT1"), Levels=I("1"), Values=I("2")) new.info <- c(Class="Id_Geno", Levels="7" , Values="64208 64209 64210 64211 64212 64213 64214") dat <- rbind(dat, new.info) dat new.info <- c(Class=" Id_Rep ", Levels="2" , Values="12") dat <- rbind(dat, new.info) dat It works. The R console result can be seen in the attachment. CU, Corinna -----Urspr?ngliche Nachricht----- Von: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] Im Auftrag von elyakhlifi mustapha Gesendet: Montag, 23. April 2007 16:02 An: R-help at stat.math.ethz.ch Betreff: [R] data frame hello, I wanna print something like this Class Levels Values Id_TrT1 1 2 Id_Geno 7 64208 64209 64210 64211 64212 64213 64214 Id_Rep 2 12 Is it possible? I have some problem I think taht I should use data.frame with matrix but I'm not sure and perhaps it's false ___________________________________________________________________________ [[alternative HTML version deleted]] ______________________________________________ R-help at 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.