Hello All: I would like to get some help with the following problem and understand how this can be done in R efficiently. The header is given in the data frame.
*Component, TLA* C1, TLA1 C2, TLA1 C1, TLA2 C3, TLA2 C4, TLA3 C5, TLA3 Notice that C1 is a component of TLA1 and TLA2. I would like to form groups of mutually exclusive subsets and create a new column called group for this subset. For the above data, the subsets and the new group column value will be like so: *Component, TLA, Group* C1, TLA1, 1 C2, TLA1, 1 C1, TLA2, 1 C3, TLA2, 1 C4, TLA3, 2 C5, TLA3, 2 Appreciate any help on this. I could have looped through the observations and tried some logic but I did not try that yet. -- Satish Vadlamani [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.