Hi, I have a experiment like this: Trat Rep Peak CAS 1 1 1 123-92-2 1 1 2 109-21-7 1 1 3 2867-05-2 1 1 ... ... 1 1 33 99-86-5 1 2 1 562-74-3 1 2 2 123-92-2 1 2 3 109-21-7 1 2 ... ... 1 2 45 2867-05-2 ... 14 3 18 2867-05-2
Trat = Treatment - range from 1 to 14 Rep = Biological Replicate - range from 1 to 3 Peak = Peak from GC/MS chromatogram - range from 1 to n (n>1) CAS = oil CAS Number [1] I would like to compare all 14 treatments (3 replicates) and print only Trat and Rep and Peak that have exclusive CAS, and the CAS number, off course. In fact, I would like to know if there are exclusive CAS in a specific treatment. Is it possible to do it inside R? Could you share a code ou paper ou tutorial to do that? Or point me out a R package/library? Thank you very much! 1. https://www.cas.org/content/chemical-substances/faqs -- Marcelo ______________________________________________ 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.
